Degussa Aktiengesellschaft

Abb Ag

Sensycon Gesellschaft Fur Industrielle Sensor-systeme Und

Karl Ehinger

Kurt Eiermann

Ralf Huck

Harald U Müller

Klaus-Jürgen Zeiger

The disclosure relates to a thermometer having an exchangeable measurement insert for measuring process temperatures of liquid or gaseous media in vessels of process installations, and to a method for replacing the measurement insert. On the basis of a thermometer in which the measurement insert is accommodated, such that it can be changed, in a protective tube which is closed at one end and has a process flange, the closed end of the protective tube being immersed, as far as the process flange, in a container in which the medium whose temperature is to be determined is situated, and the open end of the protective tube being guided at least indirectly to a connection housing in which at least connection terminals for connecting the measurement insert to a remote measured value processing system are arranged, provision is made for the transition from the open end of the protective tube to the connection housing to have a clearance fit with a cylindrical fitting surface between the measurement insert and a fitting sleeve which at least partially surrounds the latter.

Thermometer having an exchangeable measurement insert, and method for replacing the latter

A temperature probe (20) is provided which comprises a sensor (22) mounted within a protecting tube (38). A gap is defined between the sensor (22) and the protecting tube (38). The gap (46) between the sensor and the protecting tube is filled with a dry gas such a helium.

Temperature probe

In order to avoid local overheating on the surface of an intrinsically safe measuring transducer provided with current limiting resistors and embedded in a sealing composition, a body of a good heat conducting material is arranged within the sealing composition in the vicinity of the current limiting resistors.

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Karlstein, Germany

Karl Ehinger