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  <xs:element id="itri_LongTermPerformanceRestrictedStockAwardMember" abstract="true" name="LongTermPerformanceRestrictedStockAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_StockIncentivePlanMember" abstract="true" name="StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_Authorizedsharereservereductioninstockoptionsorshareappreciationrightsavailableforissueconversionratio" abstract="false" name="Authorizedsharereservereductioninstockoptionsorshareappreciationrightsavailableforissueconversionratio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_Authorizedsharereservereductioninawardsotherthanstockoptionsorshareappreciationrightsavailableforissueconversionratio" abstract="false" name="Authorizedsharereservereductioninawardsotherthanstockoptionsorshareappreciationrightsavailableforissueconversionratio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_UnrestrictedStockAwardsCompensationExpense" abstract="false" name="UnrestrictedStockAwardsCompensationExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_VestedAndReleasedMember" abstract="true" name="VestedAndReleasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_VestedButNotReleasedMember" abstract="true" name="VestedButNotReleasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_SharesIssuedSharesShareBasedPaymentArrangementVestedButNotReleased" abstract="false" name="SharesIssuedSharesShareBasedPaymentArrangementVestedButNotReleased" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="itri_UnsecuredMulticurrencyRevolvingLinesOfCreditMember" abstract="true" name="UnsecuredMulticurrencyRevolvingLinesOfCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_LineofCreditFacilityRemainingcapacitytosupportlettersofcredit" abstract="false" name="LineofCreditFacilityRemainingcapacitytosupportlettersofcredit" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_ProductWarrantyExpenseBenefit" abstract="false" name="ProductWarrantyExpenseBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_A2025StockRepurchaseProgramMember" abstract="true" name="A2025StockRepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_CommonStockConversionPrice" abstract="false" name="CommonStockConversionPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="itri_ClassOfWarrantOrRightPremiumPercentage" abstract="false" name="ClassOfWarrantOrRightPremiumPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_ClassOfWarrantOrRightAggregateProceedsFromTransaction" abstract="false" name="ClassOfWarrantOrRightAggregateProceedsFromTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_AccumulatedOtherComprehensiveIncomeNetUnrealizedGainLossOnNonderivativeInstrumentsMember" abstract="true" name="AccumulatedOtherComprehensiveIncomeNetUnrealizedGainLossOnNonderivativeInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_TaxProvisionBenefitAbstract" abstract="true" name="TaxProvisionBenefitAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_UnitedStatesAndCanadaMember" abstract="true" name="UnitedStatesAndCanadaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_DepreciationAndAmortizationExpenseBySegmentAbstract" abstract="true" name="DepreciationAndAmortizationExpenseBySegmentAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_ContractwithCustomernet" abstract="false" name="ContractwithCustomernet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_ContractwithCustomerLiabilityRevenueRecognizedFromCurrentPeriod" abstract="false" name="ContractwithCustomerLiabilityRevenueRecognizedFromCurrentPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_ContractwithCustomerOtheradjustments" abstract="false" name="ContractwithCustomerOtheradjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable" abstract="true" name="ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_UrbintIncMember" abstract="true" name="UrbintIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_ScheduleOfAssetsAndLiabilitiesAcquiredInABusinessCombinationLineItems" abstract="true" name="ScheduleOfAssetsAndLiabilitiesAcquiredInABusinessCombinationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_JustinK.PatrickMember" abstract="true" name="JustinK.PatrickMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
