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    <link:label id="lab_srt_MajorCustomersAxis_EE808D13AC3E7CD08CE21FE6C4B7C979_label_en-US" xlink:label="lab_srt_MajorCustomersAxis_EE808D13AC3E7CD08CE21FE6C4B7C979" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_MajorCustomersAxis" xlink:label="loc_srt_MajorCustomersAxis_EE808D13AC3E7CD08CE21FE6C4B7C979" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_MajorCustomersAxis_EE808D13AC3E7CD08CE21FE6C4B7C979" xlink:to="lab_srt_MajorCustomersAxis_EE808D13AC3E7CD08CE21FE6C4B7C979" xlink:type="arc" />
    <link:label id="lab_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF_terseLabel_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:label id="lab_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF_label_en-US" xlink:label="lab_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Customer [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/srt/2018/elts/srt-2018-01-31.xsd#srt_NameOfMajorCustomerDomain" xlink:label="loc_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF" xlink:to="lab_srt_NameOfMajorCustomerDomain_B60773B2C1FB8371860D1FE6C4B797FF" xlink:type="arc" />
    <link:label id="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66_terseLabel_en-US" xlink:label="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Threshold for Reporting Customer Concentration [Member]</link:label>
    <link:label id="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66_label_en-US" xlink:label="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Threshold for Reporting Customer Concentration [Member]</link:label>
    <link:label id="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66_documentation_en-US" xlink:label="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The threshold for reporting customer concentration. For any customer that meets or exceeds this threshold, the percentage of concentration with the given customer or customers is provided.</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66" xlink:to="lab_itri_ThresholdforReportingCustomerConcentrationMember_DE8DF8878755082821231FE6C4B76E66" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11_terseLabel_en-US" xlink:label="lab_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unusual or Infrequent Item, or Both [Axis]</link:label>
    <link:label id="lab_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11_label_en-US" xlink:label="lab_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unusual or Infrequent Item, or Both [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnusualOrInfrequentItemAxis" xlink:label="loc_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11" xlink:to="lab_us-gaap_UnusualOrInfrequentItemAxis_D57C6E93C184042248641FE6C4B73B11" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D_terseLabel_en-US" xlink:label="lab_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unusual or Infrequent Item, or Both [Domain]</link:label>
    <link:label id="lab_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D_label_en-US" xlink:label="lab_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unusual or Infrequent Item, or Both [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnusualOrInfrequentItemDomain" xlink:label="loc_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D" xlink:to="lab_us-gaap_UnusualOrInfrequentItemDomain_F2ED495A397351DEF6FC1FE6C4B8BF0D" xlink:type="arc" />
    <link:label id="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34_terseLabel_en-US" xlink:label="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Insurance Recovery, net of tax [Member]</link:label>
    <link:label id="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34_label_en-US" xlink:label="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Insurance Recovery, net of tax [Member]</link:label>
    <link:label id="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34_documentation_en-US" xlink:label="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Insurance Recovery, net of tax [Member]</link:label>
    <link:loc xlink:href="itri-20181231.xsd#itri_InsuranceRecoverynetoftaxMember" xlink:label="loc_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34" xlink:to="lab_itri_InsuranceRecoverynetoftaxMember_82164EB66319F53B72F21FE6C4B89B34" xlink:type="arc" />
    <link:label id="lab_us-gaap_SegmentDomain_10EBA2D1098B39954E201FE6C4B87559_terseLabel_en-US" xlink:label="lab_us-gaap_SegmentDomain_10EBA2D1098B39954E201FE6C4B87559" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Segments [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_SegmentDomain" xlink:label="loc_us-gaap_SegmentDomain_10EBA2D1098B39954E201FE6C4B87559" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_SegmentDomain_10EBA2D1098B39954E201FE6C4B87559" xlink:to="lab_us-gaap_SegmentDomain_10EBA2D1098B39954E201FE6C4B87559" xlink:type="arc" />
    <link:label id="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD_terseLabel_en-US" xlink:label="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Water Operating Segment [Member]</link:label>
    <link:label id="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD_label_en-US" xlink:label="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Water Operating Segment [Member]</link:label>
    <link:label id="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD_documentation_en-US" xlink:label="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Water Operating Segment [Member]</link:label>
    <link:loc xlink:href="itri-20181231.xsd#itri_WaterOperatingSegmentMember" xlink:label="loc_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD" xlink:to="lab_itri_WaterOperatingSegmentMember_004BDBE4069A8F1D0DB71FE6C4B826FD" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of reportable segments</link:label>
    <link:label id="lab_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F_label_en-US" xlink:label="lab_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Reportable Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfReportableSegments" xlink:label="loc_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F" xlink:to="lab_us-gaap_NumberOfReportableSegments_606553E331FBE3B81A301FE6C4B9390F" xlink:type="arc" />
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6_terseLabel_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of operating segments</link:label>
    <link:label id="lab_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6_label_en-US" xlink:label="lab_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Operating Segments</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="loc_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6" xlink:to="lab_us-gaap_NumberOfOperatingSegments_3162E5A993F44FCFC2581FE6C4B959F6" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D_terseLabel_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Percentage of total company revenue represented by one customer</link:label>
    <link:label id="lab_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D_label_en-US" xlink:label="lab_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Concentration Risk, Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_ConcentrationRiskPercentage1" xlink:label="loc_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D" xlink:to="lab_us-gaap_ConcentrationRiskPercentage1_BAAF7AA7649F587A52211FE6C4B9FA8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C_terseLabel_en-US" xlink:label="lab_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Unusual or infrequent item, or both, insurance proceeds</link:label>
    <link:label id="lab_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C_label_en-US" xlink:label="lab_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Unusual or Infrequent Item, or Both, Insurance Proceeds</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_UnusualOrInfrequentItemInsuranceProceeds" xlink:label="loc_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C" xlink:to="lab_us-gaap_UnusualOrInfrequentItemInsuranceProceeds_D633ACBEA896F05B06811FE6C4BA683C" xlink:type="arc" />
    <link:label id="lab_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356_terseLabel_en-US" xlink:label="lab_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of Assets and Liabilities Acquired in a Business Combination [Table]</link:label>
    <link:label id="lab_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356_label_en-US" xlink:label="lab_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Assets and Liabilities Acquired in a Business Combination [Table]</link:label>
    <link:label id="lab_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356_documentation_en-US" xlink:label="lab_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Schedule of Assets and Liabilities Acquired in a Business Combination [Table]</link:label>
    <link:loc xlink:href="itri-20181231.xsd#itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable" xlink:label="loc_itri_ScheduleOfAssetsAndLiabilitiesAcquiredInBusinessCombinationTable_D4A0D035979C399BEABE1FE6C49D0356" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis_8253D10CB0608EB910FF1FE6C49D824D" xlink:type="locator" />
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    <link:label id="lab_itri_CoreDevelopedTechnologyMember_F1ECE71C934B3CDCD72B1FE6C49E3764_terseLabel_en-US" xlink:label="lab_itri_CoreDevelopedTechnologyMember_F1ECE71C934B3CDCD72B1FE6C49E3764" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Core Developed Technology [Member]</link:label>
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_F9DB82E6B055426284371FE6C81E4AF5_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsPolicyTextBlock_F9DB82E6B055426284371FE6C81E4AF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsPolicyTextBlock" xlink:label="loc_us-gaap_CashAndCashEquivalentsPolicyTextBlock_F9DB82E6B055426284371FE6C81E4AF5" xlink:type="locator" />
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    <link:label id="lab_us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_561726F3E01E7F0825441FE6C81F4D2F_label_en-US" xlink:label="lab_us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_561726F3E01E7F0825441FE6C81F4D2F" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xlink:label="loc_us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_561726F3E01E7F0825441FE6C81F4D2F" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ReceivablesPolicyTextBlock_C408E52F50BBF8550C1A1FE6C81F8AE7_terseLabel_en-US" xlink:label="lab_us-gaap_ReceivablesPolicyTextBlock_C408E52F50BBF8550C1A1FE6C81F8AE7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Accounts Receivable and Allowance for Doubtful Accounts</link:label>
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    <link:label id="lab_us-gaap_InventoryPolicyTextBlock_DF0A2EA4230605CE189C1FE6C81F5682_terseLabel_en-US" xlink:label="lab_us-gaap_InventoryPolicyTextBlock_DF0A2EA4230605CE189C1FE6C81F5682" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Inventories</link:label>
    <link:label id="lab_us-gaap_InventoryPolicyTextBlock_DF0A2EA4230605CE189C1FE6C81F5682_label_en-US" xlink:label="lab_us-gaap_InventoryPolicyTextBlock_DF0A2EA4230605CE189C1FE6C81F5682" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Inventory, Policy [Policy Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_InventoryPolicyTextBlock" xlink:label="loc_us-gaap_InventoryPolicyTextBlock_DF0A2EA4230605CE189C1FE6C81F5682" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DerivativesPolicyTextBlock_0B3A40630B357E6D0F4B1FE6C81F5DEB_terseLabel_en-US" xlink:label="lab_us-gaap_DerivativesPolicyTextBlock_0B3A40630B357E6D0F4B1FE6C81F5DEB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Derivative Instruments</link:label>
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    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_99D4E33C03088C2BCFAE1FE6C81F7CBB_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentPolicyTextBlock_99D4E33C03088C2BCFAE1FE6C81F7CBB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant, and Equipment</link:label>
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    <link:label id="lab_itri_PrepaidDebtFeesPolicyTextBlock_9E779CB10B43D5C595531FE6C81F0C52_terseLabel_en-US" xlink:label="lab_itri_PrepaidDebtFeesPolicyTextBlock_9E779CB10B43D5C595531FE6C81F0C52" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Prepaid Debt Fees</link:label>
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    <link:label id="lab_us-gaap_BusinessCombinationsPolicy_2E5ADD93FE02AEC16F001FE6C81F1DF1_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationsPolicy_2E5ADD93FE02AEC16F001FE6C81F1DF1" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Business Combinations</link:label>
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    <link:label id="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_76883418B9F3E268C30D1FE6C820FE5A_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAndIntangibleAssetsPolicyTextBlock_76883418B9F3E268C30D1FE6C820FE5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill and Intangible Assets</link:label>
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    <link:label id="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_F9A9FB7E0AB57E2423CE1FE6C820037A_terseLabel_en-US" xlink:label="lab_us-gaap_CommitmentsAndContingenciesPolicyTextBlock_F9A9FB7E0AB57E2423CE1FE6C820037A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Contingencies</link:label>
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    <link:label id="lab_us-gaap_CompensationRelatedCostsPolicyTextBlock_5B8DF4ECD8EB14AA06161FE6C820DA2A_terseLabel_en-US" xlink:label="lab_us-gaap_CompensationRelatedCostsPolicyTextBlock_5B8DF4ECD8EB14AA06161FE6C820DA2A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Compensation Related Costs, Policy</link:label>
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    <link:label id="lab_us-gaap_StandardProductWarrantyPolicy_08605D51F7E8D77FE8391FE6C820589F_terseLabel_en-US" xlink:label="lab_us-gaap_StandardProductWarrantyPolicy_08605D51F7E8D77FE8391FE6C820589F" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Warranty</link:label>
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    <link:label id="lab_itri_ContractwithCustomernet_4EB66A4DD7BB6EB6C8521FE6C486048A_periodStartLabel_en-US" xlink:label="lab_itri_ContractwithCustomernet_4EB66A4DD7BB6EB6C8521FE6C486048A" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Beginning balance, January 1</link:label>
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    <link:label id="lab_itri_AlternateBaseRate1Member_EB848A4D83BC0AD9796B1FE6C6C6E064_documentation_en-US" xlink:label="lab_itri_AlternateBaseRate1Member_EB848A4D83BC0AD9796B1FE6C6C6E064" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The first of three alternate base rates under a credit facility agreement.</link:label>
    <link:loc xlink:href="itri-20181231.xsd#itri_AlternateBaseRate1Member" xlink:label="loc_itri_AlternateBaseRate1Member_EB848A4D83BC0AD9796B1FE6C6C6E064" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_itri_AlternateBaseRate1Member_EB848A4D83BC0AD9796B1FE6C6C6E064" xlink:to="lab_itri_AlternateBaseRate1Member_EB848A4D83BC0AD9796B1FE6C6C6E064" xlink:type="arc" />
    <link:label id="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A_terseLabel_en-US" xlink:label="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alternate base rate (2) [Member]</link:label>
    <link:label id="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A_label_en-US" xlink:label="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alternate base rate (2) [Member]</link:label>
    <link:label id="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A_documentation_en-US" xlink:label="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The second of three alternate base rates under a credit facility agreement.</link:label>
    <link:loc xlink:href="itri-20181231.xsd#itri_AlternateBaseRate2Member" xlink:label="loc_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A" xlink:to="lab_itri_AlternateBaseRate2Member_2D55A3B094FAA0B60E8C1FE6C6C60A0A" xlink:type="arc" />
    <link:label id="lab_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB_terseLabel_en-US" xlink:label="lab_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Alternate base rate (3) [Member]</link:label>
    <link:label id="lab_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB_label_en-US" xlink:label="lab_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Alternate base rate (3) [Member]</link:label>
    <link:label id="lab_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB_documentation_en-US" xlink:label="lab_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The third of three alternate base rates under a credit facility agreement.</link:label>
    <link:loc xlink:href="itri-20181231.xsd#itri_AlternateBaseRate3Member" xlink:label="loc_itri_AlternateBaseRate3Member_78541A4B3F1C3149ED6F1FE6C6C7DECB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DebtInstrumentNameDomain_17FD0F0FB661173A34FB1FE6C6C87A44_verboseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentNameDomain_17FD0F0FB661173A34FB1FE6C6C87A44" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Subordinated Borrowing, Name [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="loc_us-gaap_DebtInstrumentNameDomain_17FD0F0FB661173A34FB1FE6C6C87A44" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentNameDomain_17FD0F0FB661173A34FB1FE6C6C87A44" xlink:to="lab_us-gaap_DebtInstrumentNameDomain_17FD0F0FB661173A34FB1FE6C6C87A44" xlink:type="arc" />
    <link:label id="lab_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A_terseLabel_en-US" xlink:label="lab_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Standby Letters of Credit [Member]</link:label>
    <link:label id="lab_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A_label_en-US" xlink:label="lab_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Standby Letters of Credit [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_StandbyLettersOfCreditMember" xlink:label="loc_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A" xlink:to="lab_us-gaap_StandbyLettersOfCreditMember_77BAFA0FE06BACAA07321FE6C6C9425A" xlink:type="arc" />
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25_terseLabel_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:label id="lab_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25_label_en-US" xlink:label="lab_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Revolving Credit Facility [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_RevolvingCreditFacilityMember" xlink:label="loc_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25" xlink:to="lab_us-gaap_RevolvingCreditFacilityMember_60D348D77FCFB0B3177A1FE6C6C94A25" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, face amount</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Face Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="loc_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A" xlink:to="lab_us-gaap_DebtInstrumentFaceAmount_04A7E4A567347A18EB951FE6C6CA3B5A" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit facility, maximum borrowing capacity</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7" xlink:to="lab_us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_E0FD8D5733B992BC86441FE6C6CA27F7" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Line of credit facility, unused capacity, commitment fee percentage</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Unused Capacity, Commitment Fee Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5" xlink:to="lab_us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_5D09BAEC8C51E229AB651FE6C6CA1EF5" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, description of variable rate basis</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Description of Variable Rate Basis</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentDescriptionOfVariableRateBasis" xlink:label="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4" xlink:to="lab_us-gaap_DebtInstrumentDescriptionOfVariableRateBasis_E726494935B2440FFFDA1FE6C6CB52D4" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, basis spread on variable rate</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Basis Spread on Variable Rate</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3" xlink:to="lab_us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_C9DA15930971F69C7B591FE6C6CB21A3" xlink:type="arc" />
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16_terseLabel_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Debt instrument, interest rate at period end</link:label>
    <link:label id="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16_label_en-US" xlink:label="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Debt Instrument, Interest Rate, Effective Percentage</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16" xlink:to="lab_us-gaap_DebtInstrumentInterestRateEffectivePercentage_38F0F86947EE54557D621FE6C6CB7C16" xlink:type="arc" />
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8_terseLabel_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Letters of credit outstanding, amount</link:label>
    <link:label id="lab_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8_label_en-US" xlink:label="lab_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Letters of Credit Outstanding, Amount</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LettersOfCreditOutstandingAmount" xlink:label="loc_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8" xlink:to="lab_us-gaap_LettersOfCreditOutstandingAmount_920A6003ADDF213606831FE6C6CB1DB8" xlink:type="arc" />
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473_verboseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Net available for additional borrowings and LOCs</link:label>
    <link:label id="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473_label_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Line of Credit Facility, Remaining Borrowing Capacity</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2018/elts/us-gaap-2018-01-31.xsd#us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity" xlink:label="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473" xlink:to="lab_us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity_D53E5669D5DF60217C981FE6C6CB1473" xlink:type="arc" />
    <link:label id="lab_itri_RestructuringCostsEmployeeTerminationRequiredServicePeriod_2FD10C30A5802125DDE41FE6C8040357_terseLabel_en-US" xlink:label="lab_itri_RestructuringCostsEmployeeTerminationRequiredServicePeriod_2FD10C30A5802125DDE41FE6C8040357" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Remaining service period of terminated employees</link:label>
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