Patent ID: 7743663
Filing Date: 2010-06-29
Classification: G01L

Abstract:
1. A sensor unit for measuring a measurable variable, especially in an aggressive medium ( 2 ) comprising a sensor ( 4 ) which is disposed in a sensor casing ( 3 ) and provided with a sensor zone ( 6 ) located on a base ( 5 ) wherein for the detection of the measurable variable in the sensor zone ( 6 ) a measuring hole ( 7 ) is provided in the sensor casing ( 3 ) which allows the medium ( 2 ) to advance directly to the sensor zone ( 6 ), and a side of the sensor zone ( 6 ) that faces away from the measuring hole ( 7 ) is equipped with a measuring surface ( 9 ) which encompasses measuring electronics ( 8 ) wherein for the transmission of a sensor signal generated by the measuring electronics ( 8 ) an electrical feeder ( 10 ) is provided on the sensor ( 4 ), and the sensor ( 4 ) is sealingly arranged on a sealing surface ( 11 ) located on the sensor casing ( 3 ) so that the measuring surface ( 9 ) is isolated from the aggressive medium ( 2 ) characterized in that a disconnecting means ( 12 ) is provided by means of which the sensor ( 4 ) can be disconnected from thermally and/or mechanically induced changes of the sensor casing ( 3 ).