Piezoelectric pressure sensor

Details Piezoelectric pressure sensor Piezoelectric pressure sensor

1975-03-17

1977-04-19

Budd, Mark O.

Electrical generator or motor structure

Educational or construction units or kits

310 87, H01L 4104

Patent

active

040190722

ABSTRACT:
A piezoelectric pressure sensor for detecting the amount of oil in an engine oil pan of an automobile, and liquid level or the amount of liquid such as water level in a water bath, makes use of the phenomenon that an impedance of an excited piezoelectric element varies between in a gas and in a liquid. The pressure sensor is insensitive to surrounding temperature, and has high response and is of simple construction.

REFERENCES:
patent: 2932818 (1960-04-01), Lubkin
patent: 2990482 (1961-06-01), Kenny
patent: 2990543 (1961-06-01), Rod
patent: 3220258 (1965-11-01), Rod
patent: 3349259 (1967-10-01), Kistler
patent: 3561831 (1971-02-01), Alibert et al.
patent: 3736632 (1973-06-01), Barrow
patent: 3816773 (1974-06-01), Baldwin et al.

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