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  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationOperatingLeaseLiabilitiesNoncurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" 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:element id="itri_RestructuringAndRelatedCostsIncreaseDecreaseOfExpectedCosts" abstract="false" name="RestructuringAndRelatedCostsIncreaseDecreaseOfExpectedCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" 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_StandardAndExtendedProductWarrantyAccrualWarrantiesReclassifiedToHeldForSale" abstract="false" name="StandardAndExtendedProductWarrantyAccrualWarrantiesReclassifiedToHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_PercentageOfBenefitPlansDenominatedInEuroDomain" abstract="true" name="PercentageOfBenefitPlansDenominatedInEuroDomain" 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_FiniteLivedIntangibleAssetsAmortizationExpenseNetYearOne" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationWagesAndBenefitsPayable" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationWagesAndBenefitsPayable" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_ScheduleOfChangesInBenefitObligationAndFairValueOfPlanAssetsTableTextBlock" abstract="false" name="ScheduleOfChangesInBenefitObligationAndFairValueOfPlanAssetsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <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_DeferredTaxLiabilityNotRecognized1Axis" abstract="true" name="DeferredTaxLiabilityNotRecognized1Axis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_ShorterDurationEuroDenominatedDefinedBenefitPlansMember" abstract="true" name="ShorterDurationEuroDenominatedDefinedBenefitPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_GainLossOnRestructuring" abstract="false" name="GainLossOnRestructuring" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsReclassifiedToHeldForSale" abstract="false" name="FiniteLivedIntangibleAssetsReclassifiedToHeldForSale" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" 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_AccumulatedOtherComprehensiveIncomeNetUnrealizedGainLossOnNonderivativeInstrumentsMember" abstract="true" name="AccumulatedOtherComprehensiveIncomeNetUnrealizedGainLossOnNonderivativeInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_DeferredTaxLiabilitiesDepreciationAndAmortization" abstract="false" name="DeferredTaxLiabilitiesDepreciationAndAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsLiabilitiesNet" abstract="false" name="FiniteLivedIntangibleAssetsLiabilitiesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_RevenuefromContractwithCustomerPaymentTerms" abstract="false" name="RevenuefromContractwithCustomerPaymentTerms" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <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_ScheduleOfBonusAndProfitSharingPlansAndAwardExpenseTableTextBlockTableTextBlock" abstract="false" name="ScheduleOfBonusAndProfitSharingPlansAndAwardExpenseTableTextBlockTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <xs:element id="itri_Authorizedsharereservereductioninawardsotherthanstockoptionsorshareappreciationrightsavailableforissueconversionratio" abstract="false" name="Authorizedsharereservereductioninawardsotherthanstockoptionsorshareappreciationrightsavailableforissueconversionratio" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
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  <xs:element id="itri_MachineryAndEquipmentComputersAndSoftwareAndFurnitureMember" abstract="true" name="MachineryAndEquipmentComputersAndSoftwareAndFurnitureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="itri_FiniteLivedIntangibleLiabilitiesAccretionYearFive" abstract="false" name="FiniteLivedIntangibleLiabilitiesAccretionYearFive" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_StockIssuedDuringPeriodValueNewIssuesEquityOffering" abstract="false" name="StockIssuedDuringPeriodValueNewIssuesEquityOffering" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_OwnershipInterestToBeHeldForConsolidationLineItems" abstract="true" name="OwnershipInterestToBeHeldForConsolidationLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
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  <xs:element id="itri_OutsideUnitedStatesMember" abstract="true" name="OutsideUnitedStatesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
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  <xs:element id="itri_AccumulatedNetGainLossfromDerivativeandNonderivativeInstrumentsDesignatedasHedgingInstrumentsMember" abstract="true" name="AccumulatedNetGainLossfromDerivativeandNonderivativeInstrumentsDesignatedasHedgingInstrumentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_AssetsAndLiabilitiesLeasesTableTextBlock" abstract="false" name="AssetsAndLiabilitiesLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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  <xs:element id="itri_OperatingLeaseRightOfUseAssetsAmortization" abstract="false" name="OperatingLeaseRightOfUseAssetsAmortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_Effectsofchangeinexchangerates" abstract="false" name="Effectsofchangeinexchangerates" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationAssetsNetOfImpairment" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationAssetsNetOfImpairment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <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_DisposalGroupIncludingDiscontinuedInterestReceived" abstract="false" name="DisposalGroupIncludingDiscontinuedInterestReceived" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationImpairment" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationImpairment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_EffectOfChangeInExchangeRatesUnrecognizedTaxBenefit" abstract="false" name="EffectOfChangeInExchangeRatesUnrecognizedTaxBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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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_ProductWarrantyExpenseBenefit" abstract="false" name="ProductWarrantyExpenseBenefit" 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"/>
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  <xs:element id="itri_FiniteLivedIntangibleAssetsDisposedInSaleOfBusiness" abstract="false" name="FiniteLivedIntangibleAssetsDisposedInSaleOfBusiness" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_OCIDefinedBenefitPlanCurtailment" abstract="false" name="OCIDefinedBenefitPlanCurtailment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_InterestRateSwap2Member" abstract="true" name="InterestRateSwap2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_ScheduleOfShareBasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" abstract="false" name="ScheduleOfShareBasedPaymentAwardRestrictedStockUnitsValuationAssumptionsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
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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_UnitedStatesAndCanadaMember" abstract="true" name="UnitedStatesAndCanadaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_OtherComprehensiveIncomeLossPlanAssetGainLossBeforeTax" abstract="false" name="OtherComprehensiveIncomeLossPlanAssetGainLossBeforeTax" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
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  <xs:element id="itri_DerivativeActivityVolumeTypeDomain" abstract="true" name="DerivativeActivityVolumeTypeDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_InsuranceFundMember" abstract="true" name="InsuranceFundMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <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_ClassOfWarrantOrRightPremiumPercentage" abstract="false" name="ClassOfWarrantOrRightPremiumPercentage" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <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_RestructuringReserveExpectedCashSettlements" abstract="false" name="RestructuringReserveExpectedCashSettlements" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DerivativesNumberofCounterparties" abstract="false" name="DerivativesNumberofCounterparties" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <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_RestructuringCostsEmployeeTerminationRequiredServicePeriod" abstract="false" name="RestructuringCostsEmployeeTerminationRequiredServicePeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="itri_SeniorNotesEarlyRedemptionPremiumPercentage" abstract="false" name="SeniorNotesEarlyRedemptionPremiumPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="itri_DerivativeActivityVolumeTypeAxis" abstract="true" name="DerivativeActivityVolumeTypeAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="itri_DisposalGroupIncludingDiscontinuedOperationNumberOfSubsidiariesSold" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationNumberOfSubsidiariesSold" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="itri_LongerDurationEuroDenominatedDefinedBenefitPlansMember" abstract="true" name="LongerDurationEuroDenominatedDefinedBenefitPlansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_FiniteLivedIntangibleAssetsAmortizationExpenseNetAfterYearFive" abstract="false" name="FiniteLivedIntangibleAssetsAmortizationExpenseNetAfterYearFive" 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_EffectivePeriodDomain" abstract="true" name="EffectivePeriodDomain" 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_IncomeTaxReconciliationLocalForeignTaxes" abstract="false" name="IncomeTaxReconciliationLocalForeignTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="itri_DebtInstrumentMaximumLeverageRatio" abstract="false" name="DebtInstrumentMaximumLeverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <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_CurrencySwap1Member" abstract="true" name="CurrencySwap1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="itri_HealthBenefitPlanCostsAndIncurredButNotReportedAccrualBalanceTableTextBlock" abstract="false" name="HealthBenefitPlanCostsAndIncurredButNotReportedAccrualBalanceTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="itri_UsdDenominatedTermLoanMember" abstract="true" name="UsdDenominatedTermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
