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.

According to various studies, adequate ventilation increases productivity and ability to learn. The product measures the CO₂ concentration in ambient air and alarms with sound and light when the levels exceed defined levels. Fits European standard J-boxes (mute button on the side).

Defining attributes

  • Audible alarm
  • Mute button
  • One analogue output
  • Internal automatic self-diagnostics
  • Maintenance free

eSENSE FAI is a cost-optimized sensor solution for climate monitoring in classrooms and offices, for example. According to various studies, adequate ventilation increases the productivity and ability to learn. It can also reduce the risk of temporary illness and downtime. By measuring CO₂, you get a good indicator of when “fresh” outside air must be supplied for 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 1,000 ppm should always be the target.

Article number 050-8-0061
Operating principle Non-dispersive infrared (NDIR)
Measured gas CO₂
Measurement range 0 - 3,000 ppm
Accuracy ±30 ppm ±3 % of reading
Operating range RH <95 % RH
Operation range °C <50 °C
Warm-up time ≤1 min (@ full specs <15 min)
Response time T90 < 10 sec. @ 30 cc/min. flow rate, < 3 min. diffusion time
Power supply 24 V AC
Peak current
Average current < 1 W
Communication Modbus protocol, UART
Outputs 0 to 10 V DC (CO2)
Maintenance Maintenance free
Life expectancy > 15 years
Dimensions 100 x 80 x 28 mm (L x W x H)
Weight TBA
Storage conditions -40-70 °C (display model (Disp): -20-50 °C)

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

Article number Product Description
050-8-0061 eSENSE FAI CO₂ alarm, fits European standard J-boxes.
050-8-0057 eSENSE II FAI CO₂ alarm, fits European standard J-boxes.