Senseair Carbon Dioxide (CO2) Transmitter, CO2 Transmitter
Senseair Carbon Dioxide (CO2) Transmitter, CO2 Transmitter

Senseair Carbon Dioxide (CO2) Transmitter

The Senseair aSENSE™ 045 Series and eSENSE™ 050 Series CO2 transmitters use the most recent NDIR innovation to precisely and dependably measure indoor levels of CO2.The aSENSE™ Model 045 is a computerized ease transmitter. It gauges both CO2 and temperature concentration in the surrounding air, and it also transmit information to a BMS/SCADA framework or controller.

Applications: HVAC,greenhouse,landfill gas,cofined space,marine vessels,ventilation management,Mining,cellar & gas stores


Tax /GST included

Senseair CO2 Transmitter is designed to control ventilation by transmitting the measured carbon dioxide and temperature value to the system's Master or DDC. The transmitter is flexible and suits many different ventilation strategies. According to most building regulations, the fresh air flow should, in rooms where people stay more than occasionally, be at least 7litres/sec and person. If the room occupants are adults with a lightwork-load and the outdoor CO2 concentrationis 350 ppm, this airflow answers directly to anin-door CO2 concentration of 1040 ppm. According to National Boards of Occupational Safety and Health, the CO2 concentration can therefore be used as an indicator of the IndoorAir Quality (IAQ). A CO2 concentration below 1000 ppm should then always be the aim.

Technical Specifications:

Manufacturer SenseAir
Model aSENSE Model Disp
CO2 Measurement Range  0-2000 PPM CO2

Temperature Measurement Range 

 -20 to +60°C

Accuracy (CO2)

±30ppm ±3% of reading 

Accuracy Temperature

± 1°C TBD

Operating Temperature Range 0 to +50°C
Operating Humidity Range 0 to 95% RH (non-condensing)
Warm-up Time ≤1 min. (@ full specs ≤10 minutes)
Sensor Life Expectancy >15 years
Maintenance Interval Maintenance Free
Self Diagnostics complete function check of the sensor
Display 4 Digits, 7 segments LCD with ppm / °C / % indicator (models –D)
Power Input 24 VAC/VDC±20%, 50-60 Hz (half-wave rectifier input)
Power Consumption < 3 Watts average
Wiring Connections screw terminals, max 1,5 mm2 wires/ European and US standard J-boxes
Analogue Protection PTC fuse (auto reset) on signal return M, short-circuit safe

Linear Outputs OUT1 

Linear Outputs OUT2

0-10VDC or 2-10VDC for 0-2000ppm CO2/ 

0/4 - 20mA for 0 - 2000ppm CO

0-10VDC or 2-10VDC for 0-50°C

0/4 - 20mA for 0-50°C 

D/A Resolution 10 bits, 10 mV / 0.016 mA
D/A Conversion Accuracy voltage mode: ± 2% of reading ± 50 mV current loop : ± 2% of reading ± 0.3 mA
CO2 Measurement
Operating Principle Non-dispersive infrared (NDIR) with Automatic Baseline Correction (ABC) 6
Response Time (T1/e) 2 min. diffusion time
Pressure Dependence + 1.58 % reading per kPa deviation from normal pressure, 100 kPa
Annual Zero Drift  ±0.3 % of measurement range
Temperature Measurement
Operating Principle Thermistor
Warranty 12 Months Manufacturer warranty

100 Items

Data sheet

aSENSE™ Model Disp
CO2: 0-2000 ppm ; Temp: -20 to +60 °C ;
1 year manufacture warranty

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