Temperature control for chemical sensors

Measuring and testing – Gas analysis – By vibration

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Details

73579, 73 3105, G01N 3106, G01K 1122

Patent

active

054068290

ABSTRACT:
A temperature control system for acoustic wave chemical sensors monitors the frequency output from a reference sensor packaged within a heat conductive case with a test sensor. Since the frequency output fluctuates as a function of temperature, variations in frequency from a nominal value representing a desired steady state temperature for the sensors are detected and used as a control signal for a heating element attached to the heat conductive case.

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"Surface-Acoustic-Wave Piezoelectric Microbalance" Langley Research Center, Hampton, Vir.

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