The device is designed based on the European standard 55mm system as any other European KNX manufacturers, support to measure CO₂, relative humidity and temperature, which means it can be used as CO₂, humidity and temperature controllers that limits operation in common areas. In addition, support to level configuration, which reminds user to ventilate, dehumidify when measurement value arrive to the setting level, and also display or indicate the sensor data and level on the control terminal which is with screen or indication LED.