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AO-CO2-U/A CO2 Air Quality Sensor for In-wall Mounting Indoor

Reference AO-CO2-U/A

Manufacturer: AO-Electronics

Condition: New

CO2: 0-2000 ppm
Accuracy: ± 50 ppm, ± 1 K
Output: 0-10 V
Output relay for alarms

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Overview
Specifications
Data sheet
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The Sensor measures:	CO₂ (Carbon Dioxide)

AO-CO2-U-A Download (500.72k)

The indoor air quality sensor AO-CO2-U/A registers the CO2 concentration in the air in the environment in the range of 0-10000 ppm via a nondispersive infrared sensor (NDIR). For further processing a linear output signal 0-10 V / 4-20 mA or a changeover contact is available.

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	0-2000 ppm (optional: 0-5000 ppm, 0-10000 ppm, 0-20000 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: 1,6% f. mv/kPa
Response time (t90)	< 5 min
Long term stability	±1% FS/year
Sensor	Non-dispersiver Infrarot Sensor (NDIR)
Sensor protection	mounted inside housing
Running-in time	10 minutes
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. 24 V (100 mA), threshold can be defined by 270° potentiometer
Electrical connection	screw terminals max. 1,5 mm²
Light switch program	GIRA Standard 55, pure white satin (other on request)
Cable gland	bottom side
Protection type	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.
Automatic calibration	To ensure an excellent long-term stability, in the interval of 7 days starts an automatic recalibration. This feature can be disabled on the device by DIP switch.
Manual calibration	The manual calibration of the output signal to 400 ppm (zero point) will be started by pushing the button on the circuit board (push ca. 5 s until LED is blinking). Before this it is to ensure a non-stop operating of min. 10 minutes on fresh air. After successful calibration the LED will be deactivated.
Installation	into in-wall junction box, diameter 55 mm
Approvals	CE, EAC, RoHS