The plug-in thermocouple with bayonet lock (diameter 12 mm) and 2.5 m long compensation cable made of metal braid is suitable for temperature measurement in solids using the Seebeck effect. The protective tube with a diameter of 6 mm made of heat-resistant steel, material 1.4571, is designed with a 120° tip made of ceramic (KER 221). This makes this design particularly suitable for measurements on plain bearings and tools, for example. The adjustment range of the installation length on the spring is 20 to 180 mm. The single thermocouple 1x Fe-CuNi L according to DIN 43710 is designed for temperatures from 0 to 400 °C. The compensation cable can withstand ambient temperatures from -20 to +350 °C and the connections at the end of the cable are provided with plug sleeves 6.3 according to DIN 46247.