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  <xs:element id="itri_DisposalGroupIncludingDiscontinuedPaymentsReceived" abstract="false" name="DisposalGroupIncludingDiscontinuedPaymentsReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_GoodwillExcludingNonGoodwillIntangiblesAbstract" abstract="true" name="GoodwillExcludingNonGoodwillIntangiblesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_WarrantyExpenseTableTextBlock" abstract="false" name="WarrantyExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccretionYearThree" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_InterestRateTypeAxis" abstract="true" name="InterestRateTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_SummaryofintangibleassetaccountactivityTableTextBlock" abstract="false" name="SummaryofintangibleassetaccountactivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearOne" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_A2020ProjectsMember" abstract="true" name="A2020ProjectsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccretionRemainderofFiscalYear" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionRemainderofFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_InterestRateTypeDomain" abstract="true" name="InterestRateTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_ComputersAndSoftwareGross" abstract="false" name="ComputersAndSoftwareGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_NumberOfCounterpartiesMember" abstract="true" name="NumberOfCounterpartiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationWorkingCapital" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationWorkingCapital" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DisposalGroupincludingdiscontinuedoperationsForeignCurrencyTranslationGainsLossestaxprovisionbenefit" abstract="false" name="DisposalGroupincludingdiscontinuedoperationsForeignCurrencyTranslationGainsLossestaxprovisionbenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_AlternateBaseRate3Member" abstract="true" name="AlternateBaseRate3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_DerivativeTerminationFee" abstract="false" name="DerivativeTerminationFee" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_TaxProvisionBenefitAbstract" abstract="true" name="TaxProvisionBenefitAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesNet" abstract="false" name="FiniteLivedIntangibleLiabilitiesNet" 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_GainLossOnRestructuring" abstract="false" name="GainLossOnRestructuring" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_EffectivePeriodAxis" abstract="true" name="EffectivePeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_UnitedStatesAndCanadaMember" abstract="true" name="UnitedStatesAndCanadaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_DerivativeCounterparties" abstract="false" name="DerivativeCounterparties" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="itri_CashReceiptsFromRestructuring" abstract="false" name="CashReceiptsFromRestructuring" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationNumberOfSubsidiariesSold" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationNumberOfSubsidiariesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="itri_CommonStockConversionPrice" abstract="false" name="CommonStockConversionPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="itri_EffectOfChangeInExchangeRates" abstract="false" name="EffectOfChangeInExchangeRates" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_A2018ProjectsMember" abstract="true" name="A2018ProjectsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_EURIBORMember" abstract="true" name="EURIBORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_VestedAndReleasedMember" abstract="true" name="VestedAndReleasedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_CurrencySwap2Member" abstract="true" name="CurrencySwap2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_InterestRateSwap2Member" abstract="true" name="InterestRateSwap2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_EffectivePeriodDomain" abstract="true" name="EffectivePeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_NetworkedSolutionsSegmentMember" abstract="true" name="NetworkedSolutionsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccretionAfterYearFour" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionAfterYearFour" nillable="true" xbrli:periodType="instant" 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="nonnum:domainItemType"/>
  <xs:element id="itri_AssetImpairmentAndNetGainLossOnSaleOrDisposalMember" abstract="true" name="AssetImpairmentAndNetGainLossOnSaleOrDisposalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsLiabilitiesNet" abstract="false" name="FiniteLivedIntangibleAssetsLiabilitiesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" 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_FiniteLivedIntangibleLiabilitiesYearFour" abstract="false" name="FiniteLivedIntangibleLiabilitiesYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_ClassOfWarrantOrRightPremiumPercentage" abstract="false" name="ClassOfWarrantOrRightPremiumPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_Authorizedsharereservereductioninstockoptionsorshareappreciationrightsavailableforissueconversionratio" abstract="false" name="Authorizedsharereservereductioninstockoptionsorshareappreciationrightsavailableforissueconversionratio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_WriteOffOfPrepaidDebtFeesOnSeniorNotes" abstract="false" name="WriteOffOfPrepaidDebtFeesOnSeniorNotes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_ScheduleOfShareBasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" abstract="false" name="ScheduleOfShareBasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <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_AlternateBaseRate2Member" abstract="true" name="AlternateBaseRate2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_OtherIncomeExpenseMember" abstract="true" name="OtherIncomeExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FirstQuarter2021Member" abstract="true" name="FirstQuarter2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearFour" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_OperatingLeaseRightOfUseAssetsAmortization" abstract="false" name="OperatingLeaseRightOfUseAssetsAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_CreditFacilityMember" abstract="true" name="CreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FinitelivedintangibleliabilitiesGross" abstract="false" name="FinitelivedintangibleliabilitiesGross" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DerivativeActivityVolumeTypeAxis" abstract="true" name="DerivativeActivityVolumeTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_AccumulatedNetGainLossfromDerivativeandNonderivativeInstrumentsDesignatedasHedgingInstrumentsMember" abstract="true" name="AccumulatedNetGainLossfromDerivativeandNonderivativeInstrumentsDesignatedasHedgingInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearTwo" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_StockIncentivePlanMember" abstract="true" name="StockIncentivePlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <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_IntangibleAssetsAbstract" abstract="true" name="IntangibleAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_DerivativePurchasePrice" abstract="false" name="DerivativePurchasePrice" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesForeignCurrencyTranslationGainLoss" abstract="false" name="FiniteLivedIntangibleLiabilitiesForeignCurrencyTranslationGainLoss" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DocumentInformationAbstract" abstract="true" name="DocumentInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_StockIssuedDuringPeriodSharesNewIssuesEquityOffering" abstract="false" name="StockIssuedDuringPeriodSharesNewIssuesEquityOffering" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="itri_SeniorNoteAdditionalInformationAbstract" abstract="true" name="SeniorNoteAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_CustomerAMember" abstract="true" name="CustomerAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_DebtInstrumentDebtCovenantRequiredRate" abstract="false" name="DebtInstrumentDebtCovenantRequiredRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_UnsecuredMulticurrencyRevolvingLinesOfCreditMember" abstract="true" name="UnsecuredMulticurrencyRevolvingLinesOfCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearThree" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_FourthQuarter2020Member" abstract="true" name="FourthQuarter2020Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <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_DerivativeActivityVolumeTypeDomain" abstract="true" name="DerivativeActivityVolumeTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationCashOutflowAtClosing" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationCashOutflowAtClosing" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationSalesPrice" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationSalesPrice" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_AlternateBaseRateMember" abstract="true" name="AlternateBaseRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsDisposedInSaleOfBusiness" abstract="false" name="FiniteLivedIntangibleAssetsDisposedInSaleOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_LongTermPerformanceRestrictedStockAwardMember" abstract="true" name="LongTermPerformanceRestrictedStockAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_Authorizedsharereservereductioninawardsotherthanstockoptionsorshareappreciationrightsavailableforissueconversionratio" abstract="false" name="Authorizedsharereservereductioninawardsotherthanstockoptionsorshareappreciationrightsavailableforissueconversionratio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccumulatedAccretion" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccumulatedAccretion" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedInterestReceived" abstract="false" name="DisposalGroupIncludingDiscontinuedInterestReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DepreciationAndAmortizationExpenseAssociatedWithSegmentsTableTextBlock" abstract="false" name="DepreciationAndAmortizationExpenseAssociatedWithSegmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="itri_OutcomesSegmentMember" abstract="true" name="OutcomesSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccretionYearTwo" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
