Sensor for determining a physical property of a test gas

Details Sensor for determining a physical property of a test gas Sensor for determining a physical property of a test gas

2005-03-02

2009-02-24

Fitzgerald, John (Department: 2856)

Measuring and testing

Gas analysis

Gas of combustion

C073S031050, C204S428000

Reexamination Certificate

active

07493796

ABSTRACT:
A sensor is described for determining a physical property of a gas that is to be measured, especially the pressure, the temperature or the concentration of a gas component in the exhaust gas of internal combustion engines, which has a sensor element supported in a sensor housing whose gas-sensitive sensor section protrudes from the sensor housing, and has a protective tube that surrounds the sensor section. In order to achieve an effective protection of the gas-sensitive sensor section from water drops and solid substances included in the exhaust gas, in conjunction with cost-effective production of the protective tube, protective tube is developed spiral-shaped, yielding a tube wall that is spiral-shaped in cross section.

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