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<!--Created on: 5/2/2015 4:19:29 AM-->
<!--Modified on: 5/2/2015 4:19:29 AM-->
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  <xsd:element name="ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsAbstract" id="ctrl_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateIntrinsicValueAbstract" id="ctrl_ShareBasedCompensationArrangementByShareBasedPaymentAwardAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermObligationsDisclosureTextBlock" id="ctrl_LongTermObligationsDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StockOptionAndIncentive2013PlanMember" id="ctrl_StockOptionAndIncentive2013PlanMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="ctrl_ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInNumberOfSharesAuthorizedAsPercentageOfSharesOutstanding" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardIncreaseInNumberOfSharesAuthorizedAsPercentageOfSharesOutstanding" nillable="true" type="num:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_SalesReturnsAndWarrantyAccrualsCurrent" name="SalesReturnsAndWarrantyAccrualsCurrent" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="ComputerEquipmentAndSoftwareMember" id="ctrl_ComputerEquipmentAndSoftwareMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ManufacturingToolsAndTestEquipmentMember" id="ctrl_ManufacturingToolsAndTestEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LabAndWarehouseEquipmentMember" id="ctrl_LabAndWarehouseEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MarketingEquipmentMember" id="ctrl_MarketingEquipmentMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OperatingLeasesTermOfExtension" id="ctrl_OperatingLeasesTermOfExtension" type="xbrli:durationItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PurchaseCommitmentsAbstract" id="ctrl_PurchaseCommitmentsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentNumberOfEqualMonthlyPaymentsOfPrincipalAndInterest" id="ctrl_DebtInstrumentNumberOfEqualMonthlyPaymentsOfPrincipalAndInterest" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="GeographicInformationPolicyTextBlock" id="ctrl_GeographicInformationPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EmployeeAndNonemployeeStockOptionMember" id="ctrl_EmployeeAndNonemployeeStockOptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="ctrl_OperatingLossAndTaxCreditCarryforwardsMinimumPeriodOfExaminationsAndAdjustments" name="OperatingLossAndTaxCreditCarryforwardsMinimumPeriodOfExaminationsAndAdjustments" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="CashAndCashEquivalentsBalanceSheetLocationMember" id="ctrl_CashAndCashEquivalentsBalanceSheetLocationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ShortTermInvestmentsBalanceSheetLocationMember" id="ctrl_ShortTermInvestmentsBalanceSheetLocationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongTermInvestmentsBalanceSheetLocationMember" id="ctrl_LongTermInvestmentsBalanceSheetLocationMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAndAvailableForSaleSecuritiesTableTextBlock" id="ctrl_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisAndAvailableForSaleSecuritiesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <element id="ctrl_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" name="AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" name="AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_CashAndCashEquivalentsAndInvestmentsAdjustedCost" name="CashAndCashEquivalentsAndInvestmentsAdjustedCost" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_CashAndCashEquivalentsAndInvestmentsUnrealizedGains" name="CashAndCashEquivalentsAndInvestmentsUnrealizedGains" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_CashAndCashEquivalentsAndInvestmentsUnrealizedLosses" name="CashAndCashEquivalentsAndInvestmentsUnrealizedLosses" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_ScheduleOfCompanysIntangibleAssetsAndRelatedAccumulatedAmortization" name="ScheduleOfCompanysIntangibleAssetsAndRelatedAccumulatedAmortization" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_NoncashOrPartNoncashLandlordPaidTenantImprovements" name="NoncashOrPartNoncashLandlordPaidTenantImprovements" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_NexusTechnologiesMember" name="NexusTechnologiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_ManufacturingEquipmentMember" name="ManufacturingEquipmentMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="ctrl_DubaiAuthorizedDistributorMember" name="DubaiAuthorizedDistributorMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
</xsd:schema>
