Gas and Specialty Sensors

A/CO2 Series

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A/CO2 Series

CO2 Room Transmitter A/CO2 Series

CO2 Room Transmitter


The A/CO2 Series is based on a single beam, non dispersive infrared technology and is a cost efficient solution for measuring carbon dioxide (CO2) levels for building climate control. Kele is the leading supplier of building automation products. When you need the right product, right now, count on Kele.


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  • Universal outputs (0-5 VDC, 0-10 VDC, and 4-20 mA)
  • 0 to 2,000 ppm range (default on each unit)
  • Infrared Sensing Technology (Based on single beam)
  • Outputs, Setpoints, Override available for each unit
  • 5 Year Limited Warranty

Supply Voltage:24 VAC +/-20%, 50/60 Hz (half-wave rectifier); 16.5-40 VDC Max.

Power Consumption:3VA for 24VAC, 3W for 24VDC (peak); <0.9W (average)

Sensing Technology/Sensing Method:Single beam infrared sensing technology (NDIR); Diffusion

Measurement Range Default:0 to 2,000 ppm

CO2 Output Signal:Out 1: 0-5 VDC or 0-10 VDC (Default) | Out 2: 4-20 mA (500 Ohm Load Max.)

Fail Safe: Polarity protected

CO2 Accuracy:+/- 40 ppm +/- 3% of reading (@ 15-35°C; 20-70% RH and 101.3 kPa)

Pressure Dependence:+ 1.6% reading per kPa (deviation from standard pressure 101.3 kPa)

Response Time:≤ 2 minutes, diffusion

Warm Up Time: < 1 minute (@ full specs < 15 minutes)

Temperature Output:Various (see order grid)

Temperature Accuracy:+/- 1°F (+/- 0.6°C)

Operating Temperature/Relative Humidity Range:32 to 122oF (0 to 50oC)/0 to 95%, non-condensing

Sensor Coverage Area:7,500 sq. ft. maximum

Life Expectancy:> 15 years (typical)

Product Dimesions (Room Mount):(H) 4.5” (W) 2.75” (D) 1.12”

Product Dimesions (Duct Mount):(H) 5.98” (W) 3.33” (D) 1.85”

Warranty: 5 years

Download Additional Data

document   ACO2 SERIES Datasheet
document   ACO2 SERIES Installation Guide