aSENSE MIII is a controller with built-in sensors to monitor carbon dioxide and carbon monoxide at the same time. With these parameters, the programmable unit can control, e.g. ventilation rates, and generate alarm signals for personal safety devices. This product is designed for stand-alone operation, as well as being connected to larger building automation systems.

Defining attributes

  • Maintenance free
  • Two sensors in one housing
  • Flexible control outputs for connection to DDC, or direct control of dampers and speed regulated fans
  • Contributes to lower energy costs when applied in Demand Controlled Ventilation
  • Internal data recorder for environmental trend logging
  • Serial com port for connection to PC, GSM-module or local network

The aSENSE MIII is applicable in most large spaces where combustion is the source of the potential toxic danger, such as in public garages, truck terminals, tunnels and mines. It offers the possibility to combine CO and CO2 measurements which not just guarantees public safety, but also saves energy when applied to Demand Controlled Ventilation.

This product offers the possibility to regulate ventilation systems stand-alone, as well as being just a sensor in a larger system. To cover larger spaces, e.g. several sensors could be joined in a simple relay loop and together control an intermittent two-speed exhaust fan.

Article number 040-8-0064
Operating principle For carbon dioxide: Non-dispersive infrared (NDIR)
For carbon monoxide: Fuel type electrochemical gas sensor with temperature compensation
Measured gas CO, CO₂
Measurement range 0-3%
Operating range RH 5 - 85 % RH
Operation range °C <50 °C
Warm-up time TBA
Response time <3 min
Power supply 24 V AC
Peak current
Average current <3 W
Communication Modbus protocol, UART
Outputs 0/2 to 10 VDC or 0/4-20mA (CO)
Outputs 0/2 to 10 VDC or 0/4-20mA (CO2)
Maintenance Maintenance free
Life expectancy >5 years
Dimensions 150 x 85 x 46 mm (L x W x H)
Storage conditions -40-70 °C
Accuracy (CO2 ) ±30 ppm ±3% of reading
Accuracy (CO) ±10 ppm

Disclaimer : Please refer to product specification for the complete technical details.

040-8-0066 aSENSE MIII Duct Disp Display