- The sensor is available in two modifications: CO2-1 and CO2-2.
- The CO2-1 model incorporates LED lights for CO2 concentration and operation buttons indicating the level of three operation modes: 1 – on, 2 – off, 3 – operation by CO2 concentration.
- The button is used to switch the ventilation system on or off when CO2 – based ventilation control is not required.
- The CO2-2 model has no LED-lights and on/off button.
- The model is applied for premises requiring permanent ventilation, i.e. at school classes and other public premises.