Ultrasonic micro-sensor for level leak alert and interface detec

Details Ultrasonic micro-sensor for level leak alert and interface detec Ultrasonic micro-sensor for level leak alert and interface detec

1994-12-12

1998-04-07

Dougherty, Elizabeth L.

Measuring and testing

Liquid level or depth gauge

73 173, G01F 2300

Patent

active

057351660

ABSTRACT:
An ultrasonic sensor for detecting the presence of a liquid having an elongated body of plastic material with spaced arms at one end defining an air gap between the arms with each arm having a piezoelectric element at its inner face. The body houses a circuit board on which components of an ultrasonic sensing circuit that reacts to produce a signal when liquid is present in the air gap. The body is small in dimensions and is flat making it easy to install into restricted space applications.

REFERENCES:
patent: 3825025 (1974-07-01), Samuel et al.
patent: 4299114 (1981-11-01), Silvermetz et al.
patent: 5282388 (1994-02-01), Czajkoski
patent: 5428984 (1995-07-01), Jones et al.
patent: 5452611 (1995-09-01), Jones et al.

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