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

Product number


Measurement range CO2

0 - 3,000 ppm

Measurement range CO

0 - 100 ppm

Accuracy CO2

±30 ppm ±3% of reading

Accuracy CO

±10 ppm


150 mm x 85 mm x 46 mm

Operation temperature range

0 to +50°C

Operation humidity range

5 to 85% RH (non-condensing)

Power supply

24 VAC ±20%, 50-60 Hz

Power Consumtion

< 3 Watts average


UART connector



OUT1 linear output

0/2 to 10 VDC or 0/4-20mA (CO)

OUT2 linear output

0/2 to 10 VDC or 0/4-20mA (CO2)