Multifunctional Air Quality Sensor for CO, Mixed Gas VOC, Humidity and Temperature and atmospheric/barometric air pressure, with Measuring Range Changeover.
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|
|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)|
|Working range r.H.||0...98% r.H. in contaminant-free, non-condensing air|
|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.|
|Approvals||CE, EAC, RoHS