Apparatus for monitoring impurities in a gas stream

Details Apparatus for monitoring impurities in a gas stream Apparatus for monitoring impurities in a gas stream

1992-10-08

1994-08-23

McMahon, Timothy M.

Measuring and testing

Gas analysis

By vibration

73 2406, G01N 2902

Patent

active

053396758

ABSTRACT:
A device is provided comprising a piezoelectric material and at least one coating reactive with trace quantities of oxygen and/or water in reactive and inert gases. The piezoelectric material is bonded to a conductor for delivering an alternating electric current and to a conductor for transmitting resonant vibration frequency of the crystal. The reactive coating has an effective thickness which provides a serviceable life for the coating while not being so thick as to prevent vibration of the piezoelectric material.

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