Acoustic transducer for level measurement in corrosive chemical

Details Acoustic transducer for level measurement in corrosive chemical Acoustic transducer for level measurement in corrosive chemical

1995-02-10

1996-08-27

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

367908, 310336, 310340, H04R 1700

Patent

active

055507905

ABSTRACT:
An ultrasound transducer includes a resonant driving assembly having an ultrasound radiating surface covered with a propagation disc of impedance matching material. The resonant driving assembly and propagation disc are housed in a polymeric or stainless steel enclosure. All exposed surfaces of the enclosure, resonant driving assembly, and disc are covered with a coating of polyparaxylylene to make the transducer substantially impervious to industrial chemicals.

REFERENCES:
patent: 4072056 (1978-02-01), Lee
patent: 4183007 (1980-01-01), Baird
patent: 5121628 (1992-06-01), Merkl et al.
patent: 5295120 (1994-03-01), McShane
patent: 5315563 (1994-05-01), Lichtenfels, II et al.
patent: 5327041 (1994-07-01), Culp
patent: 5363341 (1994-11-01), Schwald et al.

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