Dew point detection method and device

Details Dew point detection method and device Dew point detection method and device

1981-02-26

1983-03-29

Goldstein, Herbert

Thermal measuring and testing

Transformation point determination

Between gaseous and liquid states

73599, G01N 2568

Patent

active

043781683

ABSTRACT:
A piezoelectric sensor consists of material for transmitting elastic waves and has a surface subjected to the condensation and presence of dew and liquid to be detected. A wave producing device includes a transmitter for producing an acoustic surface wave on the surface in conjunction with piezoelectric phenomena of the sensor. A detector includes a receiver for receiving the wave after transmission thereof across the surface. The wave is variably attenuated in transmission between the transmitter and receiver in accordance with dew or liquid on the surface. A measuring device measures the attenuation of the detected wave and thereby indicates the dew point or presence of liquid on the surface.

REFERENCES:
patent: 3293901 (1966-12-01), Van Scoyoc et al.
patent: 4312228 (1982-01-01), Wohltjen

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