<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
<!--Generated by ThunderDome XBRL - 08:12PM UTC 2023-03-09--><xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:country="http://xbrl.sec.gov/country/2022" xmlns:currency="http://xbrl.sec.gov/currency/2022" xmlns:dei="http://xbrl.sec.gov/dei/2022" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:exch="http://xbrl.sec.gov/exch/2022" xmlns:hbio="http://www.harvardbioscience.com/20221231" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:naics="http://xbrl.sec.gov/naics/2022" xmlns:sic="http://xbrl.sec.gov/sic/2022" xmlns:srt="http://fasb.org/srt/2022" xmlns:srt-types="http://fasb.org/srt-types/2022" xmlns:stpr="http://xbrl.sec.gov/stpr/2022" xmlns:us-gaap="http://fasb.org/us-gaap/2022" xmlns:us-types="http://fasb.org/us-types/2022" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:xlink="http://www.w3.org/1999/xlink" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.harvardbioscience.com/20221231">
  <xsd:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/naics/2022" schemaLocation="https://xbrl.sec.gov/naics/2022/naics-2022.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/country/2022" schemaLocation="https://xbrl.sec.gov/country/2022/country-2022.xsd"/>
  <xsd:import namespace="http://fasb.org/srt/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-2022.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/dei/2022" schemaLocation="https://xbrl.sec.gov/dei/2022/dei-2022.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/sic/2022" schemaLocation="https://xbrl.sec.gov/sic/2022/sic-2022.xsd"/>
  <xsd:import namespace="http://fasb.org/us-types/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-types-2022.xsd"/>
  <xsd:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/stpr/2022" schemaLocation="https://xbrl.sec.gov/stpr/2022/stpr-2022.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/exch/2022" schemaLocation="https://xbrl.sec.gov/exch/2022/exch-2022.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/currency/2022" schemaLocation="https://xbrl.sec.gov/currency/2022/currency-2022.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xsd:import namespace="http://fasb.org/srt-types/2022" schemaLocation="https://xbrl.fasb.org/srt/2022/elts/srt-types-2022.xsd"/>
  <xsd:import namespace="http://fasb.org/us-gaap/2022" schemaLocation="https://xbrl.fasb.org/us-gaap/2022/elts/us-gaap-2022.xsd"/>
  <xsd:import namespace="http://www.xbrl.org/2009/role/negated" schemaLocation="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd"/>
  <xsd:annotation>
    <xsd:appinfo>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hbio-20221231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hbio-20221231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hbio-20221231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="hbio-20221231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="statement-document-and-entity-information" roleURI="http://www.harvardbioscience.com/20221231/role/statement-document-and-entity-information">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">000 - Document - Document And Entity Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-balance-sheets" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-balance-sheets">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">001 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-balance-sheets-parentheticals" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-balance-sheets-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">002 - Statement - Consolidated Balance Sheets (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-statements-of-operations" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-statements-of-operations">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">003 - Statement - Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-statements-of-comprehensive-income-loss" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-statements-of-comprehensive-income-loss">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">004 - Statement - Consolidated Statements of Comprehensive Income (Loss)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-statements-of-comprehensive-income-loss-parentheticals" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-statements-of-comprehensive-income-loss-parentheticals">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">005 - Statement - Consolidated Statements of Comprehensive Income (Loss) (Parentheticals)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-statements-of-stockholders-equity" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-statements-of-stockholders-equity">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">006 - Statement - Consolidated Statements of Stockholders' Equity</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-consolidated-statements-of-cash-flows" roleURI="http://www.harvardbioscience.com/20221231/role/statement-consolidated-statements-of-cash-flows">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">007 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-1-organization" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-1-organization">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">008 - Disclosure - Note 1 - Organization</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-2-summary-of-significant-accounting-policies" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-2-summary-of-significant-accounting-policies">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">009 - Disclosure - Note 2 - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-accumulated-other-comprehensive-loss" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-3-accumulated-other-comprehensive-loss">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">010 - Disclosure - Note 3 - Accumulated Other Comprehensive Loss</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-goodwill-and-intangible-assets" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-4-goodwill-and-intangible-assets">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">011 - Disclosure - Note 4 - Goodwill and Intangible Assets</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-balance-sheet-information" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-5-balance-sheet-information">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">012 - Disclosure - Note 5 - Balance Sheet Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-restructuring-and-other-exit-costs" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-6-restructuring-and-other-exit-costs">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">013 - Disclosure - Note 6 - Restructuring and Other Exit Costs</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-related-party-transactions" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-7-related-party-transactions">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">014 - Disclosure - Note 7 - Related Party Transactions</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">015 - Disclosure - Note 8 - Employee Benefit Plans</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-leases" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-9-leases">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">016 - Disclosure - Note 9 - Leases</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">017 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-longterm-debt" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-11-longterm-debt">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">018 - Disclosure - Note 11 - Long-term Debt</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">019 - Disclosure - Note 12 - Revenues</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">020 - Disclosure - Note 13 - Income Tax</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-commitments-and-contingent-liabilities" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-14-commitments-and-contingent-liabilities">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">021 - Disclosure - Note 14 - Commitments and Contingent Liabilities</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-15-litigation-settlement" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-15-litigation-settlement">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">022 - Disclosure - Note 15 - Litigation Settlement</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-segment-and-related-information-" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-16-segment-and-related-information-">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">023 - Disclosure - Note 16 - Segment and Related Information</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-government-assistance" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-17-government-assistance">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">024 - Disclosure - Note 17 - Government Assistance</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-18-subsequent-event-derivatives" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-18-subsequent-event-derivatives">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">025 - Disclosure - Note 18 - Subsequent Event - Derivatives</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-significant-accounting-policies-policies" roleURI="http://www.harvardbioscience.com/20221231/role/statement-significant-accounting-policies-policies">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">026 - Disclosure - Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-2-summary-of-significant-accounting-policies-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-2-summary-of-significant-accounting-policies-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">027 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-accumulated-other-comprehensive-loss-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-3-accumulated-other-comprehensive-loss-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">028 - Disclosure - Note 3 - Accumulated Other Comprehensive Loss (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-goodwill-and-intangible-assets-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-4-goodwill-and-intangible-assets-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">029 - Disclosure - Note 4 - Goodwill and Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-balance-sheet-information-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-5-balance-sheet-information-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">030 - Disclosure - Note 5 - Balance Sheet Information (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-restructuring-and-other-exit-costs-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-6-restructuring-and-other-exit-costs-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">031 - Disclosure - Note 6 - Restructuring and Other Exit Costs (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">032 - Disclosure - Note 8 - Employee Benefit Plans (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-leases-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-9-leases-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">033 - Disclosure - Note 9 - Leases (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">034 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-longterm-debt-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-11-longterm-debt-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">035 - Disclosure - Note 11 - Long-term Debt (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">036 - Disclosure - Note 12 - Revenues (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">037 - Disclosure - Note 13 - Income Tax (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-segment-and-related-information-tables" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-16-segment-and-related-information-tables">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">038 - Disclosure - Note 16 - Segment and Related Information (Tables)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-2-summary-of-significant-accounting-policies-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-2-summary-of-significant-accounting-policies-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">039 - Disclosure - Note 2 - Summary of Significant Accounting Policies (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-2-summary-of-significant-accounting-policies-property-plant-and-equipment-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-2-summary-of-significant-accounting-policies-property-plant-and-equipment-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">040 - Disclosure - Note 2 - Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-3-accumulated-other-comprehensive-loss-changes-in-each-component-of-other-comprehensive-loss-net-of-tax-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-3-accumulated-other-comprehensive-loss-changes-in-each-component-of-other-comprehensive-loss-net-of-tax-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">041 - Disclosure - Note 3 - Accumulated Other Comprehensive Loss - Changes in Each Component of Other Comprehensive Loss, Net of Tax (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-goodwill-and-intangible-assets-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-4-goodwill-and-intangible-assets-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">042 - Disclosure - Note 4 - Goodwill and Intangible Assets (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-goodwill-and-intangible-assets-change-in-carrying-amount-of-goodwill-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-4-goodwill-and-intangible-assets-change-in-carrying-amount-of-goodwill-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">043 - Disclosure - Note 4 - Goodwill and Intangible Assets - Change in Carrying Amount of Goodwill (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-goodwill-and-intangible-assets-intangible-assets-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-4-goodwill-and-intangible-assets-intangible-assets-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">044 - Disclosure - Note 4 - Goodwill and Intangible Assets - Intangible Assets (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-4-goodwill-and-intangible-assets-future-amortization-expense-of-intangible-assets-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-4-goodwill-and-intangible-assets-future-amortization-expense-of-intangible-assets-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">045 - Disclosure - Note 4 - Goodwill and Intangible Assets - Future Amortization Expense of Intangible Assets (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-balance-sheet-information-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-5-balance-sheet-information-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">046 - Disclosure - Note 5 - Balance Sheet Information (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-balance-sheet-information-inventories-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-5-balance-sheet-information-inventories-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">047 - Disclosure - Note 5 - Balance Sheet Information - Inventories (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-balance-sheet-information-property-plant-and-equipment-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-5-balance-sheet-information-property-plant-and-equipment-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">048 - Disclosure - Note 5 - Balance Sheet Information - Property, Plant and Equipment (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-5-balance-sheet-information-other-current-liabilities-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-5-balance-sheet-information-other-current-liabilities-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">049 - Disclosure - Note 5 - Balance Sheet Information - Other Current Liabilities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-restructuring-and-other-exit-costs-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-6-restructuring-and-other-exit-costs-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">050 - Disclosure - Note 6 - Restructuring and Other Exit Costs (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-6-restructuring-and-other-exit-costs-restructuring-and-other-exit-charges-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-6-restructuring-and-other-exit-costs-restructuring-and-other-exit-charges-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">051 - Disclosure - Note 6 - Restructuring and Other Exit Costs - Restructuring and Other Exit Charges (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-7-related-party-transactions-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-7-related-party-transactions-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">052 - Disclosure - Note 7 - Related Party Transactions (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">053 - Disclosure - Note 8 - Employee Benefit Plans (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-defined-benefit-pension-expense-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-defined-benefit-pension-expense-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">054 - Disclosure - Note 8 - Employee Benefit Plans - Defined Benefit Pension Expense (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-change-in-benefit-obligations-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-change-in-benefit-obligations-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">055 - Disclosure - Note 8 - Employee Benefit Plans - Change in Benefit Obligations (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-change-in-fair-value-of-plan-assets-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-change-in-fair-value-of-plan-assets-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">056 - Disclosure - Note 8 - Employee Benefit Plans - Change in Fair Value of Plan Assets (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-change-in-benefit-obligation-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-change-in-benefit-obligation-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">057 - Disclosure - Note 8 - Employee Benefit Plans - Change in Benefit Obligation (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-recognized-in-consolidated-balance-sheets-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-recognized-in-consolidated-balance-sheets-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">058 - Disclosure - Note 8 - Employee Benefit Plans - Recognized in Consolidated Balance Sheets (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-weighted-average-assumptions-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-weighted-average-assumptions-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">059 - Disclosure - Note 8 - Employee Benefit Plans - Weighted Average Assumptions (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-fair-value-and-asset-allocations-of-pension-benefits-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-fair-value-and-asset-allocations-of-pension-benefits-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">060 - Disclosure - Note 8 - Employee Benefit Plans - Fair Value and Asset Allocations of Pension Benefits (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-8-employee-benefit-plans-fair-value-of-plan-assets-by-fair-value-hierarchy-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-8-employee-benefit-plans-fair-value-of-plan-assets-by-fair-value-hierarchy-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">061 - Disclosure - Note 8 - Employee Benefit Plans - Fair Value of Plan Assets By Fair Value Hierarchy (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-leases-lease-expense-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-9-leases-lease-expense-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">062 - Disclosure - Note 9 - Leases - Lease Expense (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-leases-supplemental-cash-flow-information-related-to-operating-leases-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-9-leases-supplemental-cash-flow-information-related-to-operating-leases-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">063 - Disclosure - Note 9- Leases - Supplemental Cash Flow Information Related to Operating Leases (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-leases-supplemental-balance-sheet-information-related-to-operating-leases-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-9-leases-supplemental-balance-sheet-information-related-to-operating-leases-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">064 - Disclosure - Note 9 - Leases - Supplemental Balance Sheet Information Related to Operating Leases (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-9-leases-future-minimum-lease-payments-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-9-leases-future-minimum-lease-payments-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">065 - Disclosure - Note 9 - Leases - Future Minimum Lease Payments (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">066 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-stock-option-and-restricted-stock-unit-activity-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-stock-option-and-restricted-stock-unit-activity-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">067 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation - Stock Option and Restricted Stock Unit Activity (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-earnings-loss-per-share-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-earnings-loss-per-share-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">068 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation - Earnings (Loss) Per Share (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-outstanding-and-exercisable-options-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-outstanding-and-exercisable-options-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">069 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation - Outstanding and Exercisable Options (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-stockbased-compensation-expense-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-stockbased-compensation-expense-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">070 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation - Stock-based Compensation Expense (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-10-capital-stock-and-stockbased-compensation-black-scholes-assumptions-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-10-capital-stock-and-stockbased-compensation-black-scholes-assumptions-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">071 - Disclosure - Note 10 - Capital Stock and Stock-based Compensation - Black Scholes Assumptions (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-longterm-debt-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-11-longterm-debt-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">072 - Disclosure - Note 11 - Long-term Debt (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-longterm-debt-breakdown-of-borrowings-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-11-longterm-debt-breakdown-of-borrowings-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">073 - Disclosure - Note 11 - Long-term Debt - Breakdown of Borrowings (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-11-long-term-debt-debt-maturity-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-11-long-term-debt-debt-maturity-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">074 - Disclosure - Note 11 - Long Term Debt - Debt Maturity (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">075 - Disclosure - Note 12 - Revenues (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues-disaggregation-of-revenue-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues-disaggregation-of-revenue-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">076 - Disclosure - Note 12 - Revenues - Disaggregation of Revenue (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues-deferred-revenue-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues-deferred-revenue-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">077 - Disclosure - Note 12 - Revenues - Deferred Revenue (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues-allowance-for-doubtful-accounts-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues-allowance-for-doubtful-accounts-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">078 - Disclosure - Note 12 - Revenues - Allowance for Doubtful Accounts (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-12-revenues-warranties-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-12-revenues-warranties-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">079 - Disclosure - Note 12 - Revenues - Warranties (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">080 - Disclosure - Note 13 - Income Tax (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-income-tax-expense-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-income-tax-expense-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">081 - Disclosure - Note 13 - Income Tax - Income Tax Expense (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-income-tax-rate-reconciliation-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-income-tax-rate-reconciliation-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">082 - Disclosure - Note 13 - Income Tax - Income Tax Rate Reconciliation (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-pretax-income-from-continuing-operations-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-pretax-income-from-continuing-operations-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">083 - Disclosure - Note 13 - Income Tax - Pre-tax Income From Continuing Operations (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-deferred-tax-assets-and-liabilities-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-deferred-tax-assets-and-liabilities-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">084 - Disclosure - Note 13 - Income Tax - Deferred Tax Assets and Liabilities (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-13-income-tax-unrecognized-tax-benefits-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-13-income-tax-unrecognized-tax-benefits-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">085 - Disclosure - Note 13 - Income Tax - Unrecognized Tax Benefits (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-14-commitments-and-contingent-liabilities-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-14-commitments-and-contingent-liabilities-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">086 - Disclosure - Note 14 - Commitments and Contingent Liabilities (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-15-litigation-settlement-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-15-litigation-settlement-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">087 - Disclosure - Note 15 - Litigation Settlement (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-segment-and-related-information-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-16-segment-and-related-information-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">088 - Disclosure - Note 16 - Segment and Related Information (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-segment-and-related-information-revenue-by-geographic-destination-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-16-segment-and-related-information-revenue-by-geographic-destination-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">089 - Disclosure - Note 16 - Segment and Related Information - Revenue by Geographic Destination (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-segment-and-related-information-longlived-assets-by-geographic-area-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-16-segment-and-related-information-longlived-assets-by-geographic-area-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">090 - Disclosure - Note 16 - Segment and Related Information - Long-lived Assets by Geographic Area (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-16-segment-and-related-information-net-assets-by-geographic-area-details" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-16-segment-and-related-information-net-assets-by-geographic-area-details">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">091 - Disclosure - Note 16 - Segment and Related Information - Net Assets by Geographic Area (Details)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-17-government-assistance-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-17-government-assistance-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">092 - Disclosure - Note 17 - Government Assistance (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
      <link:roleType id="statement-note-18-subsequent-event-derivatives-details-textual" roleURI="http://www.harvardbioscience.com/20221231/role/statement-note-18-subsequent-event-derivatives-details-textual">
        <link:definition xmlns="http://www.xbrl.org/2003/linkbase">093 - Disclosure - Note 18 - Subsequent Event - Derivatives (Details Textual)</link:definition>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
        <link:usedOn>link:presentationLink</link:usedOn>
      </link:roleType>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="hbio_AccountsReceivableAllowanceForCreditLossChargeoffsAndOtherReoveries" name="AccountsReceivableAllowanceForCreditLossChargeoffsAndOtherReoveries" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_AmortizationOfIntangibleAssetsIncludingAmountsRelatedToDiscontinuedOperation" name="AmortizationOfIntangibleAssetsIncludingAmountsRelatedToDiscontinuedOperation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_BiostageMember" name="BiostageMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_BlackScholesOptionPricingModelMember" name="BlackScholesOptionPricingModelMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_CaseInSuffolkSuperiorCourtMember" name="CaseInSuffolkSuperiorCourtMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_ComprehensiveIncomeLossPolicyTextBlock" name="ComprehensiveIncomeLossPolicyTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ComputerEquipmentAndSoftwareMember" name="ComputerEquipmentAndSoftwareMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_ContractWithCustomerLiabilityCustomerAdvancesCurrent" name="ContractWithCustomerLiabilityCustomerAdvancesCurrent" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hbio_CostOfRevenuesMember" name="CostOfRevenuesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_CustomerAdvancesMember" name="CustomerAdvancesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_CustomerPaymentsTerm" name="CustomerPaymentsTerm" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_DebtInstrumentCurrentMaturitiesExcessCashFlowSweep" name="DebtInstrumentCurrentMaturitiesExcessCashFlowSweep" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DebtInstrumentInterestRateStateFloorPercentage" name="DebtInstrumentInterestRateStateFloorPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DebtInstrumentQuarterlyPaymentCurrentYear" name="DebtInstrumentQuarterlyPaymentCurrentYear" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DebtInstrumentQuarterlyPaymentNextEightYears" name="DebtInstrumentQuarterlyPaymentNextEightYears" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DebtInstrumentQuarterlyPaymentThereafter" name="DebtInstrumentQuarterlyPaymentThereafter" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperation" name="DeferredIncomeTaxExpenseBenefitIncludingDiscontinuedOperation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_DeferredTaxAssetsOperatingLeases" name="DeferredTaxAssetsOperatingLeases" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DeferredTaxAssetsOperatingLossAndTaxCreditsCarryforwards" name="DeferredTaxAssetsOperatingLossAndTaxCreditsCarryforwards" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DeferredTaxLiabilitiesDefiniteLivedIntangibleAssets" name="DeferredTaxLiabilitiesDefiniteLivedIntangibleAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DeferredTaxLiabilitiesIndefiniteLivedIntangibleAssets" name="DeferredTaxLiabilitiesIndefiniteLivedIntangibleAssets" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_DeferredTaxLiabilitiesOperatingLeases" name="DeferredTaxLiabilitiesOperatingLeases" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hbio_DeferredTaxLiabilityMember" name="DeferredTaxLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_DistributionAgreementscustomerRelationshipsMember" name="DistributionAgreementscustomerRelationshipsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_DocumentAndEntityInformation" name="DocumentAndEntityInformation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_EffectiveIncomeTaxRateReconciliationChangeInReserveForUncertainTaxPositionAmount" name="EffectiveIncomeTaxRateReconciliationChangeInReserveForUncertainTaxPositionAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_EffectiveIncomeTaxRateReconciliationNetOperatingLossTrueUpsAndExpirationsAmount" name="EffectiveIncomeTaxRateReconciliationNetOperatingLossTrueUpsAndExpirationsAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensation" name="EffectiveIncomeTaxRateReconciliationNondeductibleExpenseExecutiveCompensation" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_EffectiveIncomeTaxRateReconciliationPermanentDifferencesNetAmount" name="EffectiveIncomeTaxRateReconciliationPermanentDifferencesNetAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_EmployeeStockPurchasePlanConsecutivePaymentPeriods" name="EmployeeStockPurchasePlanConsecutivePaymentPeriods" nillable="true" substitutionGroup="xbrli:item" type="xbrli:durationItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExercisePriceRange1Member" name="ExercisePriceRange1Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExercisePriceRange2Member" name="ExercisePriceRange2Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExercisePriceRange3Member" name="ExercisePriceRange3Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExercisePriceRange4Member" name="ExercisePriceRange4Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExercisePriceRange5Member" name="ExercisePriceRange5Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExistingTechnologyMember" name="ExistingTechnologyMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_Expire2023Member" name="Expire2023Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_Expire2036Member" name="Expire2036Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExpireBetween2023And2042Member" name="ExpireBetween2023And2042Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ExpireBetween2029And2038Member" name="ExpireBetween2029And2038Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_FullyDepreciatedAndDisposedOfPropertyAndEquipmentRemovedFromFixedAssetRecords" name="FullyDepreciatedAndDisposedOfPropertyAndEquipmentRemovedFromFixedAssetRecords" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_GreaterChinaMember" name="GreaterChinaMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_IndefiniteCarryforwardBeyond2038Member" name="IndefiniteCarryforwardBeyond2038Member" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_IndemnificationAgreementsMember" name="IndemnificationAgreementsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_InstrumentsEquipmentSoftwareAndAccessoriesMember" name="InstrumentsEquipmentSoftwareAndAccessoriesMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_LiabilityDrivenInvestmentFundsMember" name="LiabilityDrivenInvestmentFundsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_LiabilityForContingentIndemnificationObligations" name="LiabilityForContingentIndemnificationObligations" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hbio_MarketConditionRestrictedStockUnitsMember" name="MarketConditionRestrictedStockUnitsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_MaximumVestingRateOfTheTargetedShareholderReturnPercentage" name="MaximumVestingRateOfTheTargetedShareholderReturnPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_MinimumVestingRateOfTheTargetedShareholderReturnPercentage" name="MinimumVestingRateOfTheTargetedShareholderReturnPercentage" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_NoteToFinancialStatementDetailsTextual" name="NoteToFinancialStatementDetailsTextual" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_NotesToFinancialStatements" name="NotesToFinancialStatements" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_NotesToFinancialStatementsAbstract" name="NotesToFinancialStatementsAbstract" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_OtherPlanAssetsMember" name="OtherPlanAssetsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_PaymentsForDebtFees" name="PaymentsForDebtFees" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_PercentageOfCashAndCashEquivalentsHeldByForeignSubsidiaries" name="PercentageOfCashAndCashEquivalentsHeldByForeignSubsidiaries" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="hbio_PercentageOfConsolidatedExcessCashFlow" name="PercentageOfConsolidatedExcessCashFlow" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="instant"/>
  <xsd:element id="hbio_PreferredStockBookValueInclusiveOfAccruedDividends" name="PreferredStockBookValueInclusiveOfAccruedDividends" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element id="hbio_PreferredStockMandatoryConversionMinimumQualifiedOfferingAmount" name="PreferredStockMandatoryConversionMinimumQualifiedOfferingAmount" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hbio_ProgramsEstablishedToOffsetTheImpactOfCOVIDMember" name="ProgramsEstablishedToOffsetTheImpactOfCOVIDMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_PropertyPlantAndEquipmentUsefulLivesTableTextBlock" name="PropertyPlantAndEquipmentUsefulLivesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_ResearchAndDevelopmentTaxCreditCarryforwardsOffsetByReserveForUncertainTaxPositions" name="ResearchAndDevelopmentTaxCreditCarryforwardsOffsetByReserveForUncertainTaxPositions" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element abstract="true" id="hbio_RestOfTheWorldMember" name="RestOfTheWorldMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_ScheduleOfNetAssetsByGeographicAreasTableTextBlock" name="ScheduleOfNetAssetsByGeographicAreasTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_ScheduleOfStockOptionsAndRestrictedStockUnitsActivityRollForwardTableTextBlock" name="ScheduleOfStockOptionsAndRestrictedStockUnitsActivityRollForwardTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_SeriesEPreferredStockInBiostageMember" name="SeriesEPreferredStockInBiostageMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_ServiceMaintenanceAndWarrantyContractsMember" name="ServiceMaintenanceAndWarrantyContractsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_SharebasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsCorrelationCoefficient" name="SharebasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsCorrelationCoefficient" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:percentItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceFactorAdjustment" name="SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceFactorAdjustment" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceFactorAdjustmentWeightedAverageGrantDateFairValue" name="SharebasedCompensationArrangementBySharebasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceFactorAdjustmentWeightedAverageGrantDateFairValue" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_StandardProductWarrantyAccrualDecreaseForPaymentsOrIncreaseForCredits" name="StandardProductWarrantyAccrualDecreaseForPaymentsOrIncreaseForCredits" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_StockIssuedDuringPeriodSharesIssuedForSettlement" name="StockIssuedDuringPeriodSharesIssuedForSettlement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:sharesItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_StockIssuedDuringPeriodValueIssuedForSettlement" name="StockIssuedDuringPeriodValueIssuedForSettlement" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element id="hbio_SupplementalBalanceSheetInformatonRelatedToOperatingLeasesTableTextBlock" name="SupplementalBalanceSheetInformatonRelatedToOperatingLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_SupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" name="SupplementalCashFlowInformationRelatedToOperatingLeasesTableTextBlock" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_SwinglineLoanFacilityMember" name="SwinglineLoanFacilityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TermLoanMember" name="TermLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TheABRLoanMember" name="TheABRLoanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TheCreditAgreementMember" name="TheCreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TheLIBORLoanAndPricingGridCreditAgreementMember" name="TheLIBORLoanAndPricingGridCreditAgreementMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TheLendersMember" name="TheLendersMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TheMultiChannelSystemsFacilityAndTriangleBiosystemsLeaseAgreementsMember" name="TheMultiChannelSystemsFacilityAndTriangleBiosystemsLeaseAgreementsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TradeNamesAndPatentsMember" name="TradeNamesAndPatentsMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_TwentyTwentyOneIncentivePlanMember" name="TwentyTwentyOneIncentivePlanMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_UKPensionLiabilityMember" name="UKPensionLiabilityMember" nillable="true" substitutionGroup="xbrli:item" type="dtr-types:domainItemType" xbrli:periodType="duration"/>
  <xsd:element id="hbio_WriteoffOfFullyAmortizedIntangibleAssetsRelatedToCustomerRelationshipsAndDiscontinuedProductLines" name="WriteoffOfFullyAmortizedIntangibleAssetsRelatedToCustomerRelationshipsAndDiscontinuedProductLines" nillable="true" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-10-capital-stock-and-stockbased-compensation-black-scholes-assumptions-details" name="statement-statement-note-10-capital-stock-and-stockbased-compensation-black-scholes-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-10-capital-stock-and-stockbased-compensation-earnings-loss-per-share-details" name="statement-statement-note-10-capital-stock-and-stockbased-compensation-earnings-loss-per-share-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-10-capital-stock-and-stockbased-compensation-outstanding-and-exercisable-options-details" name="statement-statement-note-10-capital-stock-and-stockbased-compensation-outstanding-and-exercisable-options-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-10-capital-stock-and-stockbased-compensation-stock-option-and-restricted-stock-unit-activity-details" name="statement-statement-note-10-capital-stock-and-stockbased-compensation-stock-option-and-restricted-stock-unit-activity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-10-capital-stock-and-stockbased-compensation-stockbased-compensation-expense-details" name="statement-statement-note-10-capital-stock-and-stockbased-compensation-stockbased-compensation-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-10-capital-stock-and-stockbased-compensation-tables" name="statement-statement-note-10-capital-stock-and-stockbased-compensation-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-11-long-term-debt-debt-maturity-details" name="statement-statement-note-11-long-term-debt-debt-maturity-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-11-longterm-debt-breakdown-of-borrowings-details" name="statement-statement-note-11-longterm-debt-breakdown-of-borrowings-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-11-longterm-debt-tables" name="statement-statement-note-11-longterm-debt-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-12-revenues-allowance-for-doubtful-accounts-details" name="statement-statement-note-12-revenues-allowance-for-doubtful-accounts-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-12-revenues-deferred-revenue-details" name="statement-statement-note-12-revenues-deferred-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-12-revenues-disaggregation-of-revenue-details" name="statement-statement-note-12-revenues-disaggregation-of-revenue-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-12-revenues-tables" name="statement-statement-note-12-revenues-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-12-revenues-warranties-details" name="statement-statement-note-12-revenues-warranties-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-13-income-tax-deferred-tax-assets-and-liabilities-details" name="statement-statement-note-13-income-tax-deferred-tax-assets-and-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-13-income-tax-income-tax-expense-details" name="statement-statement-note-13-income-tax-income-tax-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-13-income-tax-income-tax-rate-reconciliation-details" name="statement-statement-note-13-income-tax-income-tax-rate-reconciliation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-13-income-tax-pretax-income-from-continuing-operations-details" name="statement-statement-note-13-income-tax-pretax-income-from-continuing-operations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-13-income-tax-tables" name="statement-statement-note-13-income-tax-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-13-income-tax-unrecognized-tax-benefits-details" name="statement-statement-note-13-income-tax-unrecognized-tax-benefits-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-16-segment-and-related-information-longlived-assets-by-geographic-area-details" name="statement-statement-note-16-segment-and-related-information-longlived-assets-by-geographic-area-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-16-segment-and-related-information-net-assets-by-geographic-area-details" name="statement-statement-note-16-segment-and-related-information-net-assets-by-geographic-area-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-16-segment-and-related-information-revenue-by-geographic-destination-details" name="statement-statement-note-16-segment-and-related-information-revenue-by-geographic-destination-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-16-segment-and-related-information-tables" name="statement-statement-note-16-segment-and-related-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-2-summary-of-significant-accounting-policies-property-plant-and-equipment-details" name="statement-statement-note-2-summary-of-significant-accounting-policies-property-plant-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-2-summary-of-significant-accounting-policies-tables" name="statement-statement-note-2-summary-of-significant-accounting-policies-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-3-accumulated-other-comprehensive-loss-changes-in-each-component-of-other-comprehensive-loss-net-of-tax-details" name="statement-statement-note-3-accumulated-other-comprehensive-loss-changes-in-each-component-of-other-comprehensive-loss-net-of-tax-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-3-accumulated-other-comprehensive-loss-tables" name="statement-statement-note-3-accumulated-other-comprehensive-loss-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-4-goodwill-and-intangible-assets-change-in-carrying-amount-of-goodwill-details" name="statement-statement-note-4-goodwill-and-intangible-assets-change-in-carrying-amount-of-goodwill-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-4-goodwill-and-intangible-assets-future-amortization-expense-of-intangible-assets-details" name="statement-statement-note-4-goodwill-and-intangible-assets-future-amortization-expense-of-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-4-goodwill-and-intangible-assets-intangible-assets-details" name="statement-statement-note-4-goodwill-and-intangible-assets-intangible-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-4-goodwill-and-intangible-assets-tables" name="statement-statement-note-4-goodwill-and-intangible-assets-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-5-balance-sheet-information-inventories-details" name="statement-statement-note-5-balance-sheet-information-inventories-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-5-balance-sheet-information-other-current-liabilities-details" name="statement-statement-note-5-balance-sheet-information-other-current-liabilities-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-5-balance-sheet-information-property-plant-and-equipment-details" name="statement-statement-note-5-balance-sheet-information-property-plant-and-equipment-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-5-balance-sheet-information-tables" name="statement-statement-note-5-balance-sheet-information-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-6-restructuring-and-other-exit-costs-restructuring-and-other-exit-charges-details" name="statement-statement-note-6-restructuring-and-other-exit-costs-restructuring-and-other-exit-charges-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-6-restructuring-and-other-exit-costs-tables" name="statement-statement-note-6-restructuring-and-other-exit-costs-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-change-in-benefit-obligation-details" name="statement-statement-note-8-employee-benefit-plans-change-in-benefit-obligation-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-change-in-benefit-obligations-details" name="statement-statement-note-8-employee-benefit-plans-change-in-benefit-obligations-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-change-in-fair-value-of-plan-assets-details" name="statement-statement-note-8-employee-benefit-plans-change-in-fair-value-of-plan-assets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-defined-benefit-pension-expense-details" name="statement-statement-note-8-employee-benefit-plans-defined-benefit-pension-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-fair-value-and-asset-allocations-of-pension-benefits-details" name="statement-statement-note-8-employee-benefit-plans-fair-value-and-asset-allocations-of-pension-benefits-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-fair-value-of-plan-assets-by-fair-value-hierarchy-details" name="statement-statement-note-8-employee-benefit-plans-fair-value-of-plan-assets-by-fair-value-hierarchy-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-recognized-in-consolidated-balance-sheets-details" name="statement-statement-note-8-employee-benefit-plans-recognized-in-consolidated-balance-sheets-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-tables" name="statement-statement-note-8-employee-benefit-plans-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-8-employee-benefit-plans-weighted-average-assumptions-details" name="statement-statement-note-8-employee-benefit-plans-weighted-average-assumptions-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-9-leases-future-minimum-lease-payments-details" name="statement-statement-note-9-leases-future-minimum-lease-payments-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-9-leases-lease-expense-details" name="statement-statement-note-9-leases-lease-expense-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-9-leases-supplemental-balance-sheet-information-related-to-operating-leases-details" name="statement-statement-note-9-leases-supplemental-balance-sheet-information-related-to-operating-leases-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-9-leases-supplemental-cash-flow-information-related-to-operating-leases-details" name="statement-statement-note-9-leases-supplemental-cash-flow-information-related-to-operating-leases-details" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-note-9-leases-tables" name="statement-statement-note-9-leases-tables" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
  <xsd:element abstract="true" id="hbio_statement-statement-significant-accounting-policies-policies" name="statement-statement-significant-accounting-policies-policies" nillable="true" substitutionGroup="xbrli:item" type="xbrli:stringItemType" xbrli:periodType="duration"/>
</xsd:schema>
