eSENSE FAI “Fresh Air Indicator” is an infrared and maintenance-free carbon dioxide alarm for installation in areas where the carbon dioxide levels need to be monitored, such as classrooms and offices. Adequate ventilation increases productivity and ability to learn according to many studies. The product measures the carbon dioxide concentration in ambient air and alarms with sound and light when the levels exceed defined levels.





Key benefits

-Audible alarm

-Mute button

-One analogue output

-Internal automatic self-diagnostics.

-Maintenance-free in normal applications




eSENSE. FAI is a cost-optimized sensor solution for climate monitoring in for example class rooms and offices. An adequate ventilation increase the productivity and ability to learn according to many studies. It can also reduce the risk of temporary sickness and downtime. By measuring CO2 you get a good indicator to when adequate "fresh"outside air must be supplied for an acceptable indoor air quality. The ventilation will then be based on actual demand. It helps you decrease your energy consumption and yet have a healthy indoor climate. A CO2 concentration below 1000 ppm should always be the target.




Measured gas Carbon dioxide (CO2)
Measurement range CO2 0 to 2000 ppm
Accuracy ±30 ppm ±3% of reading
Dimensions 100 mm x 80 mm x 28 mm (eSENSE FAI)130 mm x 85 mm x 30 mm (eSENSE FAI II)
Maintenance No maintenance required*
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±20%, 50-60 Hz (half-wave rectifier input)
Power Consumtion < 1 Watts average
Response timeT90 < 10 sec. @ 30 cc/min. flow rate, < 3 min. diffusion time
Warm-up time ≤1 min
OUT 1 linear output 0 to 10 V DC (CO2)

*Maintenance-free with using SenseAir ABC Self calibration using for normal indoor applications. Product Additional features
050-8-0061 eSENSE FAI Fits European standard J-boxes (mute button on the side)
050-8-0057 eSENSE FAI II Fits US standard J-boxes (visible red mute button on the front)