• CO: 0-200/500/1000 ppm
• VOC: 0-100%
• Relative Humidity: 0-100%
• Temperature: -30...+70°C/-20...+80°C/0...+50°C/0... +100°C
• Air pressure: 750...1150 mbar
• Output (select Output Type): 0-10 V or 4-20 mA
• Alarma relay output
• Protection Type IP65

The multifunctional air quality sensor CO-M/A registers the CO concentration, mixed gas VOC, temperature, humidity, air pressure and converts the respective measured result into a linear output signal 0-10 V or 4-20 mA for further processing. In addition the device has a potential free changeover contact that can be defined for CO, VOC, temperature or humidity.
The CO concentration is measured using an electro-chemical sensor. 3 different CO2 scales can be selected - 0-200 ppm, 0-500 ppm, 0-1000 ppm.
The sensitivity VOC can be set on the device at “low” (extended measurement range), “medium” (standard measurement range) and “high” (reduced measurement range).
The ´humidity and temperature are registered using a capacitive humidity sensor. 4 different scales can be selected for the temperature output signal - -30...+70°C, -20...+80°C, 0...+50°C, 0...+100°C.
As parameter for the humidity output signal the relative humidity % r.h., absolute humidity g/m³, mixing ratio g/kg or dew point temperature dp °C can be specified. The air pressure can be defined and outputted as atmospheric air pressure, or, by entering the altitude above sea level in the menu, as barometric air pressure. The VOC zero point balance depending on the actual ambient conditions can be performed at any time on the device by manual calibration. The multifunctional air quality sensor performs an automatic self-calibration at regular interval, thus ensuring a long-term stable air quality measurement.