Vector Controls CO2 Sensor Transmitter SRC-C1 Indoor Wall MountCO2 level Indication with three-color led. Minimum and maximum value memory. 010 V, 020 mA or 210 V, 420 mA measuring signals selectable with jumpers. Selectable averaging signal. Measurement range of 0 - 5000 ppm volume with ± 30 ppm ± 3 % of measured value accuracy. Operaion status LED as well as air quality CO2 Level LED indicator is included with this unit. Product Specifications BRANDVector Controls LENGTH INCHES3-1/2 WIDTH INCHES3/4 HEIGHT INCHES3-1/2 WEIGHT LBS0.4 COLORWhite CONSTRUCTIONABS Plastic TEMPERATURE - OPERATING RANGE °F32 to 122 TEMPERATURE OPERATING RANGE °C0 to 50 VOLTAGE24 VAC OPERATING HUMIDITY RANGE (%RH)95 and below, non-condensing POWER TYPEHardwired APPLICATIONIndoor CO2 Measurement, Extraction Fan TYPECO2 Transmitter LISTING, RATING, CERTIFICATIONCE Listed LIMITED WARRANTY YEARS1 MANUFACTURER'S PART NUMBERSRC-C1