With the X-Sensor sensor technology from Creative Electronic, various values can be measured in gaseous media. In addition to the usual measured values, such as temperature and relative humidity, absolute humidity and dew point can be calculated directly in the sensor, taking air pressure into account, and transmitted using standard bus systems. This sensor technology offers various combinations for applications in building automation, I&C technology and heating, ventilation, refrigeration and air conditioning technology. Depending on the area of application, the sensor is available as a duct, room or outdoor sensor. The values are transmitted via Modbus-RTU or optionally via BACnet-MS/TP. Humidity and temperature are read in via the synchronous serial interface SCK/DATA. The pressure sensor is read out via the I²C interface.