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  <xs:element id="itri_WarrantyExpenseTableTextBlock" abstract="false" name="WarrantyExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <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_ScheduleOfShareBasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" abstract="false" name="ScheduleOfShareBasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="itri_EffectivePeriodAxis" abstract="true" name="EffectivePeriodAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccretionYearTwo" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_PurchasesOfConvertibleNoteHedgeContractsNetOfTax" abstract="false" name="PurchasesOfConvertibleNoteHedgeContractsNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_CurrencySwap2Member" abstract="true" name="CurrencySwap2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_TotalIntangibleAssetsAbstract" abstract="true" name="TotalIntangibleAssetsAbstract" 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_CommonStockConversionPrice" abstract="false" name="CommonStockConversionPrice" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <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_DresserMember" abstract="true" name="DresserMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_AlternateBaseRateMember" abstract="true" name="AlternateBaseRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types: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_OutcomesSegmentMember" abstract="true" name="OutcomesSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_IntangibleAssetsAbstract" abstract="true" name="IntangibleAssetsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_A2021StockRepurchaseProgramMember" abstract="true" name="A2021StockRepurchaseProgramMember" 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_DerivativeActivityVolumeTypeAxis" abstract="true" name="DerivativeActivityVolumeTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_AlternateBaseRate1Member" abstract="true" name="AlternateBaseRate1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_PensionBenefitObligationHeldForSaleWithinOtherCurrentLiabilities" abstract="false" name="PensionBenefitObligationHeldForSaleWithinOtherCurrentLiabilities" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_FirstQuarter2021Member" abstract="true" name="FirstQuarter2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_DepreciationAndAmortizationExpenseAssociatedWithSegmentsTableTextBlock" abstract="false" name="DepreciationAndAmortizationExpenseAssociatedWithSegmentsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="itri_CurrencySwap1Member" abstract="true" name="CurrencySwap1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_NetworkedSolutionsSegmentMember" abstract="true" name="NetworkedSolutionsSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_GoodwillExcludingNonGoodwillIntangiblesAbstract" abstract="true" name="GoodwillExcludingNonGoodwillIntangiblesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_TaxProvisionBenefitAbstract" abstract="true" name="TaxProvisionBenefitAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_AccountsRecoveredWrittenOffNet" abstract="false" name="AccountsRecoveredWrittenOffNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_AssetImpairmentAndNetGainLossOnSaleOrDisposalMember" abstract="true" name="AssetImpairmentAndNetGainLossOnSaleOrDisposalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_BuildingsFurnitureAndImprovements" abstract="false" name="BuildingsFurnitureAndImprovements" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_OtherIncomeExpenseMember" abstract="true" name="OtherIncomeExpenseMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_LongTermPerformanceRestrictedStockAwardMember" abstract="true" name="LongTermPerformanceRestrictedStockAwardMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearTwo" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearTwo" 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="dtr-types:domainItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLossesNetOfTax" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationForeignCurrencyTranslationGainsLossesNetOfTax" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_CreditFacilityAdditionalInformationAbstract" abstract="true" name="CreditFacilityAdditionalInformationAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="itri_StockIssuedDuringPeriodValueNewIssuesEquityOffering" abstract="false" name="StockIssuedDuringPeriodValueNewIssuesEquityOffering" nillable="true" xbrli:periodType="duration" 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_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearOne" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_A2021ProjectsMember" abstract="true" name="A2021ProjectsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_DeviceSolutionsMember" abstract="true" name="DeviceSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_UsdDenominatedTermLoanMember" abstract="true" name="UsdDenominatedTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_StockIssuedDuringPeriodSharesNewIssuesEquityOffering" abstract="false" name="StockIssuedDuringPeriodSharesNewIssuesEquityOffering" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="itri_DepreciationExpenseTableTextBlock" abstract="false" name="DepreciationExpenseTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <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_ClassOfWarrantOrRightAggregateProceedsFromTransaction" abstract="false" name="ClassOfWarrantOrRightAggregateProceedsFromTransaction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_IncreaseDecreaseInWarranty" abstract="false" name="IncreaseDecreaseInWarranty" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DerivativeCounterparties" abstract="false" name="DerivativeCounterparties" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetRemainderofFiscalYear" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetRemainderofFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" 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_ContractwithCustomernet" abstract="false" name="ContractwithCustomernet" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <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_ContractwithCustomerOtheradjustments" abstract="false" name="ContractwithCustomerOtheradjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DebtInstrumentDebtCovenantRequiredRate" abstract="false" name="DebtInstrumentDebtCovenantRequiredRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="itri_SIlverSpringNetworksInc.Member" abstract="true" name="SIlverSpringNetworksInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_OtherCountriesMember" abstract="true" name="OtherCountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_AlternateBaseRate3Member" abstract="true" name="AlternateBaseRate3Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_FiniteLivedIntangibleLiabilitiesAccretionAfterYearFour" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_SummaryofintangibleassetaccountactivityTableTextBlock" abstract="false" name="SummaryofintangibleassetaccountactivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <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_EffectivePeriodDomain" abstract="true" name="EffectivePeriodDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_EURIBORMember" abstract="true" name="EURIBORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_CreditFacilityMember" abstract="true" name="CreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
