Indoor Air Quality CO2 Sensor

FEATURES

The indoor air quality CO 2 sensor is designed to monitor carbon dioxide (CO2 ) levels in the air and interface with the ventilation damper in an HVAC (Heating, Ventilation, and Air Conditioning) system. In addition, the sensor can be used solely for the purpose of monitoring and alarming.

The CO 2 sensor uses infrared technology to measure the levels of CO 2 in the air. These levels can be used as input to a Carrier controller to control the ventilation damper position and ensure an adequate level of outside air in the building.

• Sleek, low profile
• Mounting plate with terminal block for easy installation and wiring
• Compatible with US and European junction boxes
• CO 2 measurement range of 0 to 9999 ppm (default range of 0 to 2000 ppm)
• Versatile sensor options including optional temperature sensor, ABC Logic ™ self-calibration, 4 to 20 mA or 0 to 5/10 V output
• Solid, locking enclosure duct mounted for monitoring CO 2 levels in return airflow
• Quick, easy installation
• Lightweight and durable
• External mounting provides ease of sensor operation and maintenance

Method
Single Beam Absorption Infrared™ patented ABC Logic ™ (Automatic Background Calibration) self calibration software
Thermistor temperature measurement
Sample Method: Diffusion

Performance
Measurement Range
Analog Output: 0 to 2000 ppm

Accuracy
Typical Conditions
32 to 122 F (0° to 50 C)
400 to 1250 ppm: ± 30 ppm or 3%, whichever is greater
Tolerance on span gas of ±2%. ABC Logic not deactivated.
1250 to 2,000 ppm: ± 5% of reading + 30ppm
Tolerance on span gas of ±2%. ABC Logic not deactivated.
2000 to 10,000 ppm: ± 7% of reading, whichever is greater
Pressure Dependence
Add 0.13% of reading per mm Hg
Annual Drift
± 10 ppm (negligible) with ABC Logic
Response Time
0...90% FS (Full Scale) < 5 minutes
Warm-Up Time at 25 C < 1 minute
Operating Conditions
32 to 122 F (0° to 50 C) 0...95% RH (relative humidity), non-condensing
Storage Conditions
–40 to 158 F (–40 to 70 C)

Agency certification
CE and RoHS
Calibration Interval
No calibration needed for the life of the product with ABC Logic operating

Temperature sensor
Thermistor - NTC 10K ohms, Type II

Input/Output:
Power (dedicated power supply required)
18 to 36 VAC RMS (root mean square), 50/60 Hz
18 to 42 VDC polarity protected/dependent. 30 mA average, 90 mA peak at 24 VDC
Analog CO 2 Output
0 to 5 VDC or 0 to 10 VDC (100 ohms output impedance)
4 to 20 mA (RLmax [maximum load resistance] = 500 ohms). Both outputs are available simultaneously

Wiring
18 to 20 AWG (American Wire Gage) stranded copper wire only. Two wires each for power, analog output, and thermistor