For the control and measuring of the room air quality and temperature. Accurately measures the C02 concentration (390…10.000 ppm), humidity (0...100 %) and temperature (0…50 °C) in a room and sends the values on the bus. By using the integrated thresholds the measured values can be monitored. With the integrated controller it is possible to control the room temperature and the HVAC actuators. With integrated Bus Coupler.