Measuring and testing – Gas analysis – Detector detail
Reexamination Certificate
2011-08-09
2011-08-09
Lawrence, Frank M (Department: 1776)
Measuring and testing
Gas analysis
Detector detail
C096S117000, C096S139000
Reexamination Certificate
active
07992426
ABSTRACT:
A FET gas sensor having a relatively low operating temperature, for example, room temperature, is free from cross sensitivities from interfering gases by a preceding in-line filter. The sensor's service life is substantially stabilizable by using fabric-like activated charcoal filters which can be regenerated by a moderate temperature increase, and by limiting the diffusion of the analyte gas, which is made possible by the relatively small amount of gas detectable on the sensitive layer of the sensor. This substantially increases the service life of the filters. The gas sensor eliminates cross sensitivities to thereby increase the detection reliability thereof. Also, the gas sensor has relative long term stability and is economical to build. The gas sensor can read relatively weak signals generated by gas-sensitive layers, for example, without other stronger gas signals interfering with the weak signals.
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Fleischer Maximilian
Lampe Uwe
Meixner Hans
Pohle Roland
Schneider Ralf
Lawrence Frank M
Micronas GmbH
Muncy Geissler Olds & Lowe, PLLC
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