美國VTI公司生產，紅外一氧化碳測量模塊，測量范圍0-10%-100%范圍內。TheVALTRONICSModel2015SPI-COisanOEMNDIRsensorwithdigitalsignalprocessingandtemperaturecompensation.ThefirmwareVERSIONdependsuponthespecificcustomerinterfacerequirements.TheSPI(SerialPeripheralInterface)SeeAppNotesA59 A64.Eachserialnumberedsensorisindividuallygascalibratedandtemperaturecompensatedatthefactory.RS-232TestBoardforfieldgascalibration(SeeApplicationNoteA66).Onboard remoteswitchesforcalibrationorviaSPI.