aSENSE VAV Duct is a standalone controller with built-in sensors that measure CO2 and temperature for installa­tion in the ventilation duct. aSENSE VAV Duct has an industrial housing and is also prepared for Modbus.






Key benefits

-Cost-optimized for direct linear control of dampers and speed regulated fans.

-Contributes to lower energy costs when applied in Demand Controlled Ventilation.

-Internal automatic self diagnostics.

-Available with different measurement ranges and several housing options.

-Serial communication port for connection to a PC or a GSM module and local network.



A common application for aSENSE VAV Duct is controlling ventilation in rooms occupied by people. The sensor is flexible and designed to suit many different ventilation strategies. It is a key component for energy-effective, healthy climate control of rooms with varying load like schools / nurseries, cinemas/theatres, sports centers etc. Museums and libraries are rooms where the control of the ventilation is based on temperature and carbon dioxide measurements. It can be combined with control of humidity to secure the optimal environment of the objects. To avoid condensation problems it is often necessary to measure humidity in air conditioning and in other cooling applications.



Operating Principle Non-dispersive infrared (NDIR) with Automatic Baseline Correction (ABC)
Measured gas CO2
Measurement range CO2 0 - 2 000 ppm
Accuracy ±30 ppm ±3% of reading
Dimensions 152 mm x 85 mm x 47 mm
Maintenance Maintenance-free*
Life Expectancy > 15 years
Operation temperature range 0 to +50 °C
Operation humidity range 0 to 95% RH (non-condensing)
Power supply 24 VAC/VDC
Power Consumtion < 3 Watts average
Response timeT90 2 min. diffusion time
Warm-up time ≤ 1 min. (@ full specs ≤ 10 minutes)
Communication Uart ( Modbus)
OUT 1 linear output 0/2 to 10 V DC or 0/4-20mA 600 to 900 ppm(CO2) 23 - 24 °C
OUT 2 linear output 0/2 to 10 V DC 600 to 900 ppm (°C)
OUT 3 Relay Closed>600 ppm Open 2)
OUT 4 linear output 0 to 10 V DC or 0/4-20mA, 20 - 18 °C

*Maintenance-free with using SenseAir ABC  Self calibration using for normal indoor applications.
 Product Additional features
040-8-0024 aSENSE VAV Duct - Disp Display