Multifunctional air quality sensor for CO2, mixed gas VOC, humidity, temperature and atmospheric/barometric air pressure


  • CO2 0-2000/5000/10000 ppm

  • 0-100% VOC

  • % r.H., °C

  • mbar

  • 0-10 V, 4-20 mA, relay


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Commodity Group 2

SKU Output Description Price € net / gross * Availability Qty Action
CO2-M/A-UD 0-10 V, changer CO2: 0-2000/5000/10000 ppm , VOC: 0-100%, Humidity: 0...100% r.F., Temperature: -30...+70°C/-20...+80°C/0...+50°C/0... +100°C, Air pressure: 750...1150 mbar
Excl. Tax: €657.95 Incl. Tax: €763.22
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CO2-M/A-ID 4-20 mA, changer CO2: 0-2000/5000/10000 ppm , VOC: 0-100%, Humidity: 0...100% r.F., Temperature: -30...+70°C/-20...+80°C/0...+50°C/0... +100°C, Air pressure: 750...1150 mbar
Excl. Tax: €721.62 Incl. Tax: €837.08
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Measurement range atm. air pressure 750-1150 mbar
Measurement range bar. air pressure 750-1150 mbar
Measurement range CO2 0-10000 ppm, scales: 0-2000/5000/10000 ppm
Measurement range r.H. 0-100% r.H.
Measurement range abs. humidity 0-50 g/m³, 0-80 g/m³ (calculated) selectable by DIP switch
Measurement range air fuel ratio 0-50 g/kg, 0-80 g/kg (calculated) selectable by DIP switch
Measurement range dew point -20...+50°C DP, -20...+80°C DP, 0...+50°C DP (calculated) selectable by DIP switch
Measurement range temp. -30...+70°C, -20...+80°C, 0...+50°C, 0...+100°C selectable by DIP switch
Measurement range VOC 0-100% (good / bad air quality, referring to the calibration gas)
Scales 0-2000/5000/10000 ppm
Accuracy CO2: 0-2000 ppm: ±50 ppm + 2% f. mv, 0-5000 ppm: ±50 ppm + 3% f. mv, 0-10000 ppm: ±100 ppm + 5% f. mv;
VOC: ±15% FS;
Humidity: ±3% r.H. (30%...70% r.H., else ±5% r.H. at 20°C);
Temperature: 0,5 K (at 15...35°C, else ±1 K);
all specifications at 20°C, 45% r.h., 1013 mbar, auto-calibration ON;
Temperature dependency CO2: ±5 ppm / K, Humidity: ±0,04% r.H. / K; Temperature: ±0,1°C / 10 K
Pressure dependency CO2: air pressure compensated
Running-in time 10 min
Long term stability ±1% FS/year
Sensor CO2: nondispersive infrared sensor (NDIR); VOC: metal oxide sensor; Humidity/Temperature: capacitive humidity sensor, Air pressure: piezoresistive on-chip silicon sensor
Sensor protection sinter filter, mounted inside housing
Supply voltage 24 V AC/DC (±5%)
Current consumption at 0-10 V Ø 100 mA
Current consumption at 4-20 mA ca. 200 mA
Analogue output 0-10 V 3-wire connection
Analogue output 4-20 mA 3-wire connection
Alarm output 1 x potential-free change-over contact, 48 V, 1 A
Switching Hysteresis Relay 2%
Electrical connection screw terminals max. 1,5 mm²
Housing ABS housing with hinge closure, colour light grey like RAL 7024
Cable gland M16x1,5 high-strength cable gland with strain relief
Display LCD display with backlight
Dimensions Housing: L 150 x W 80 x H 62 mm
Protection type IP65 (housing), IP54 (probe)
Protection class III
Working range r.H. 0...98% r.H. in contaminant-free, non-condensing air
Working temperature 0...+50°C
Storage temperature -20...+50°C
Initial operation After switch-on of the device follows a self-test and the tempering, which takes ca. 10 minutes depending on the environmental conditions. At this time the analogue output drifts from the actual measurement value.
Installation screw fastening
Approvals CE, EAC, RoHS

The multifunctional air quality sensor CO2-M/A registers the CO2 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 CO2, VOC, temperature or humidity.
The CO2 concentration is measured via a nondispersive infrared sensor (NDIR). 3 different CO2 scales can be selected - 0-2000 ppm, 0-5000 ppm, 0-10000 ppm. For a high precision CO2 reading an air pressure compensation is performed during the infrared measurement.
The sensitivity VOC can be set on the device at “low", “medium” and “high”.
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 CO2/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.