Dry/dew/frost sensor

Details Dry/dew/frost sensor Dry/dew/frost sensor

1983-03-21

1985-06-11

Yasich, Daniel M.

Measuring and testing

Gas analysis

Moisture content or vapor pressure

324 65R, G01N 2730, G01W 100

Patent

active

045220603

ABSTRACT:
A dry/dew/frost sensor comprising a plurality of sensor units, each sensor unit comprising a ceramic substrate (1, 2) whose permittivity is lower than ice and a pair of electrodes (3, 4; 5, 6) being arranged on the ceramic substrate in contact therewith, wherein adjacent sensor units are arranged so as to face each other at a predetermined distance so that the pair of electrodes (3, 4; 5, 6) may be opposed to each other, and the impedance between the pair of electrodes on each of the sensor unit varying with changes in three states, dry, bedewed, and frosted states.

REFERENCES:
patent: 2647238 (1953-07-01), Pear, Jr.
patent: 3287974 (1966-11-01), Cemochowski
patent: 3422677 (1969-06-01), Lockwood
patent: 3540278 (1970-11-01), Diamond et al.
patent: 3676820 (1970-07-01), Taguche
patent: 3900815 (1975-08-01), Taguche
patent: 4007435 (1977-02-01), Tien
patent: 4419889 (1983-12-01), Muto et al.

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