The air quality sensor CO2-A/A registers the CO2 concentration in the air in the environment in the range of 0-10000 ppm via a nondispersive infrared sensor (NDIR) and converts this measured value into a linear output signal 0-10 V respectively. 4-20 mA.
As an option the air quality sensor has a potential-free changeover contact and a backlit display. The display content can be rotated in 90° steps using a menu and the measured value, the switching threshold set, the state of the relay, the MIN/MAX measured values for the selected intervals (1 h / 6 h / 12 h / 24 h) etc. can be read out.
3 different measuring ranges can be selected (0-2000 ppm, 0-5000 ppm, 0-10000 ppm) which can be switched, according to requirements, by the innovative DIP switching technology.
The zero point balance depending on the actual ambient conditions can be performed on the device by manual calibration. The quality sensor performs an automatic self-calibration at regular interval, thus ensuring a long-term stable CO2 measurement.
- Measurement range CO2 0-10000 ppm, scales: 0-2000/5000/10000 ppm
- Scales 0-2000/5000/10000 ppm
- Accuracy 0-2000 ppm: ±50 ppm + 2% f. mv, 0-5000 ppm: ±50 ppm + 3% f. mv, else: ±100 ppm + 5% f. mv (at 20°C, 1013 mbar, auto-calibration ON)
- Temperature dependency CO2: ±5 ppm / K
- Pressure dependency CO2: 0,16% f. mv/hPa
- Running-in time 10 min
- Response time (t90) < 5 min
- Long term stability ±1% FS/year
- Sensor Nondispersive infrared sensor (NDIR)
- Sensor protection sinter filter
- Supply voltage 24 V AC/DC (±5%)
- Current consumption Ø 100 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% FS (without Display), 0,5...5% FS adjustable (with Display)
- Electrical connection screw terminals max. 1,5 mm²
- Housing Polycarbonate PC UL 94 V0 with hinge locks, color signal white similar to RAL 9003
- Cable gland PG11 high-strength cable gland with strain relief
- Display optional LCD display with backlight on/off/auto
- Dimensions Housing: L 89 x W 80 x H 47 mm
- Protection type Housing/electronic: IP65, Sensor: IP30
- 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
