Multifunctional Air Quality Sensor for CO2, Mixed Gas VOC, Humidity and Temperature with Measuring Range Changeover

The multifunctional air quality sensor CO2-M/A measures the CO2 concentration in the ambient air in the range of 0-10000 ppm (NDIR), mixed gas VOC in the range of 0...100% based on the calibration gas, the temperature and optionally the relative humidity, absolute humidity, mixing ratio or the dew point temperature of the ambient air. The transducer converts the respective measurement results for further processing into a linear output signal 0-10 V or 4-20 mA. Furthermore, the device has a potential-free changeover contact. For which measured value this output is used, can be set individually by innovative DIP switch technology. The CO2 concentration is measured by a non-dispersive infrared sensor (NDIR). There are 3 different CO2 scales (0-2000 ppm, 0-5000 ppm, 0-10000 ppm) to choose from, which can be switched as required by innovative DIP switch technology. The relative humidity and temperature is measured by a capacitive humidity sensor. There are 4 different temperature ranges (-30...+70°C, -20...+80°C, 0...+50°C, 0...+100°C) as well as 4 different humidity measurement category (% r.H., g/m³, g/kg, TP °C) to choose from, which can be switched as required by innovative DIP switch technology. The CO2 and VOC zero point adjustment in response to the current environmental conditions can be started manual on the device at any time. The multifunctional air quality sensor starts in regular intervals an automatic re-calibration procedure, whereby a long-term stable CO2 and VOC measurement is ensured.

Product specifications

Measurement range CO2:

0-10000 ppm, scales 0-2000/5000/10000 ppm by DIP-switch selectable

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

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, 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: 1,6% f. mv/kPa (compensated optional)

Response time (t90):

< 5 min

Long term stability:

±1% FS/year

Sensor:

CO2: Non-dispersiver Infrarot Sensor (NDIR);

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:

Ø 100 mA

Analogue output 0-10 V:

3-wire connection

Alarm output:

potential-free change-over contact max. 48 V (1 A), threshold can be defined by 270° potentiometer´

Electrical connection:

screw terminals max. 1,5 mm²

Housing:

polyamide with snap closing screws, colour white like RAL 9010

Cable gland:

PG11 high-strength cable gland with strain relief

Dimensions:

Housing: L 150 x W 80 x H 62 mm

Protection type:

IP65

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

Installation:

screw fastening

Approvals:

CE-conformity, EAC, RoHS