Temperature, humidity, and air pressure sensor for GUDE devices with RJ45 sensor connection for reliable environmental monitoring. The sensors 7205 to 7210 are external sensors that optionally feature two integrated signal inputs. In the combined sensors, the corresponding environmental values are measured and evaluated simultaneously. Instead of a permanently attached cable, an RJ45 socket is integrated. This allows the sensors to be connected with a shielded LAN cable of up to 40 meters in length. For monitoring purposes, this enables ideal positioning near the installation without significant effort.