Dimlux CO2 Sensor for Maxi Controller w/ 5m CableThis product is a separate CO2 sensor that can be connected to the Dimlux Maxi Controller, and which also controls a CO2 generator or CO2 pressure valve. The Dimlux CO2 Sensor uses Dual Beam NDIR technology which delivers unprecedented calibration stability and accuracy (down to 5ppm). Other CO2 sensors use Single Beam tech and must be calibrated regularly. Dual Beam sensors are two sensors in one where the measuring sensor is periodically adjusted by