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

US8398305B2 · kind B2 · utility

Assignee

• ABB AG · US

Inventors

• Karl Ehinger · Karlsruhe, DE
• Klaus-Jürgen Zeiger · Lich, DE
• Harald Müller · Gilching, DE
• Ralf Huck · Großkrotzenburg, DE

Key dates

• Filing date: Jul 30, 2008
• Grant date: Mar 19, 2013
• Expiry date: Oct 26, 2031

Classification

• Technology area (CPC G): Physics
• CPC primary: G01K1/08
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

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.