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        <link:definition>9955535 - Disclosure - GOODWILL AND INTANGIBLE ASSETS (Details Textual)</link:definition>
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  <xs:element id="intt_BusinessCombinationContingentConsiderationArrangementsAdditionalPaymentPeriod" abstract="false" name="BusinessCombinationContingentConsiderationArrangementsAdditionalPaymentPeriod" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
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  <xs:element id="intt_ContingentConsiderationLiabilitiesMember" abstract="true" name="ContingentConsiderationLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intt_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="intt_LettersOfCreditRenewalPeriod" abstract="false" name="LettersOfCreditRenewalPeriod" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="intt_DebtInstrumentAmortizationPeriod" abstract="false" name="DebtInstrumentAmortizationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
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  <xs:element id="intt_OemIntegratorsAndDistributorMember" abstract="true" name="OemIntegratorsAndDistributorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_ThermalTestingProductsMember" abstract="true" name="ThermalTestingProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_ThermalProcessMember" abstract="true" name="ThermalProcessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intt_VideoImagingMember" abstract="true" name="VideoImagingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_FlyingProbeAndIncircuitTestersMember" abstract="true" name="FlyingProbeAndIncircuitTestersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_ServiceAndOtherProductsMember" abstract="true" name="ServiceAndOtherProductsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_SemiconductorMarketMember" abstract="true" name="SemiconductorMarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_AutomotiveMember" abstract="true" name="AutomotiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intt_IndustrialMarketMember" abstract="true" name="IndustrialMarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_LifeSciencesMember" abstract="true" name="LifeSciencesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intt_PresidentOfProcessTechnologiesMember" abstract="true" name="PresidentOfProcessTechnologiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_ChiefExecutiveOfficerChiefFinancialOfficerAndDivisionPresidentsMember" abstract="true" name="ChiefExecutiveOfficerChiefFinancialOfficerAndDivisionPresidentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_SeniorManagementMemberMember" abstract="true" name="SeniorManagementMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_ChiefExecutiveOfficerAndChiefFinancialOfficerMember" abstract="true" name="ChiefExecutiveOfficerAndChiefFinancialOfficerMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_ChiefExecutiveOfficerChiefFinancialOfficerAndOtherMembersOfSeniorManagementMember" abstract="true" name="ChiefExecutiveOfficerChiefFinancialOfficerAndOtherMembersOfSeniorManagementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intt_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantedFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="intt_VideologyConsolidationMember" abstract="true" name="VideologyConsolidationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="intt_PayrollTaxesAndPayrollRelatedMember" abstract="true" name="PayrollTaxesAndPayrollRelatedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_CorporatePortionMember" abstract="true" name="CorporatePortionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="intt_DefinedContributionPlanMaximumAnnualEmployerMatchingContributionPerEmployeeAmount" abstract="false" name="DefinedContributionPlanMaximumAnnualEmployerMatchingContributionPerEmployeeAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="intt_OperatingIncomeLossAdjusted" abstract="false" name="OperatingIncomeLossAdjusted" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
