Carbon Dioxide (CO2)Indoor CO2 level is a universal accepted parameter for the condition of indoor ventilation and air quality.A time period can be preset from 1 to 24 hours, e.g. 5 hours, then the monitor can display CO2 average level duringthis period, which provides an objective and true data for the measurement of the air quality in a certain space. Non-dispersive infrared (NDIR) CO2 sensor with more than 10-year lifetime ABC self-calibration technology guarantees reliable CO2 measurement CO2 range: 0~2000ppm/0~5000ppm optional Rapid response, high stability and consistency Temperature and humidityCombined digital temperature and humidity sensor with high accuracy and stability. It also has compensation toCO2 and air quality which makes the measurements more accurate by minimizing environmental effects.Power supply：24VAC/VDC Consumption：3.5 W max. ; 2.5 W avg. Analog Outputs：Two or three analog outputs 0~10VDC(default) or 4~20mA (selectable by jumpers)0~5VDC (selected at place the order)Can be set the inverse proportion linear output by ModbusModbus RS485 interface (optional)：RS-485 with Modbus protocol, 19200bps rate, 15KV antistatic protection, independent base addressOperation conditions：0~50℃(32~122℉); 0~95%RH, non condensingStorage conditions：0~50℃(32~122℉)/ 5~80%RHWeight：320gInstallation：Fixed on the air duct with 100mm installation hole sizeIP class of the housing：IP50 for no LCD IP40 for with LCDStandard：CE-Approval
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