AO-CO-M/A Multifunctional Air Quality Sensor with display

Fuehler Systeme


Multifunctional Air Quality Sensor for CO, Mixed Gas VOC, Humidity and Temperature and atmospheric/barometric air pressure, with Measuring Range Changeover.

  • 0-2000/5000/10000 ppm
  • 0-100% VOC
  • % r.H., °C
  • mbar
  • 0-10 V, 4-20 mA, changer

750,00 €

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Type of Instrument Multisensor Platform
The instrument measures: Air Quality - VOC
The Sensor measures: Multiple Parameters
Output Signal: Multiple analog outputs
  • 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.

Measurement range CO 0-1000 ppm
Measurement range VOC 0...100% (good / bad air quality, referring to the calibration gas)
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 up to +50°C DP, -20 up to +80°C DP, 0 up to +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 atm. air pressure 750...1150 mbar
Measurement range bar. air pressure 750...1150 mbar
Scales 0-200/500/1000 ppm
Accuracy CO: ±5 ppm + max. ±5% f. mv VOC: ±15% FS; Humidity: ±3% r.H. (30...70% r.H., else ±5% r.H.); Temperature: 0,5 K (15...35°C, else ±1 K); Air pressure: ±5 mbar; all specifications at 20°C, 45% r.H. 1013 mbar, auto-calibration ON;
Temperature dependency CO: ±5 ppm / K, Humidity: ±0,04% r.H. / K; Temperature: ±0,1°C / 10 K
Long term stability ±1% FS/year
Sensor CO: Electrochemical sensor; VOC: metal oxide sensor; Humidity/Temperature: capacitive humidity sensor
Sensor protection sinter filter
Running-in time 10 min
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
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.
Automatic calibration To ensure an excellent long-term stability, in the interval of ca. 7 days (CO2) respectively ca. 20 days (VOC) starts an automatic recalibration. Through this automatic calibration possible drifts are compensated. This feature can be disabled on the device by DIP switch.
Manual calibration The manual calibration of the output signal to 400 ppm (CO2 zero point) respectively 1 V (VOC zero point) will be started by pushing the button on the circuit board (push ca. 5 s until "CAL" appears in the display). Before this it is to ensure a non-stop operating of min. 10 minutes on fresh air. After successful calibration "CAL" disappears from the display.
Installation screw fastening
Approvals CE, EAC, RoHS

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