Humidity measuring device and a heat cooker employing the device

Details Humidity measuring device and a heat cooker employing the device Humidity measuring device and a heat cooker employing the device

1993-03-05

1995-02-07

Williams, Hezron E.

Measuring and testing

Gas analysis

By vibration

7333502, G01N 2902

Patent

active

053872541

ABSTRACT:
The present invention relates to a highly reliable, accurate humidity measuring device which detects differences in humidity between datum air and measuring air as a time or a phase difference in the propagation velocity of ultrasonic waves, using ultrasonic wave generating and receiving means, and processes this difference using circuitry.

REFERENCES:
patent: 4255964 (1981-03-01), Morison
patent: 4876889 (1989-10-01), Shakkottai et al.

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