Differential pressure level sensor with temperature sensing elem

Details Differential pressure level sensor with temperature sensing elem Differential pressure level sensor with temperature sensing elem

1988-09-06

1990-01-02

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

With other measuring device

73301, 73304R, G01F 2300

Patent

active

048904929

ABSTRACT:
A strip of resistive carbon is deposited on a longitudinal plastic film and a strip of conductive copper is deposited on a second film. The two film strips are glued together with the resistive and conductive strips opposing to form a sealed envelope having a longitudinal cavity. This sandwich is placed in a flexible extruded tube membrane and the whole inserted in a longitudinal slot in a frame, with a channel communicating with the slot and the exterior of the frame. Liquid in a tank compresses the envelope, causing the copper and carbon strips to contract at a point depending on the level. The change in resistance of the carbon-copper circuit with level produces a changing voltage which is processed to provide a signal indicative of the level of in the tank. Temperature sensors in the frame provide the temperature of the at various levels.

REFERENCES:
patent: 3100885 (1963-08-01), Welkowitz et al.
patent: 3153342 (1964-10-01), Pierce et al.
patent: 3511090 (1970-05-01), Ehrenfried et al.
patent: 3583221 (1971-06-01), Ehrenfried et al.
patent: 3653262 (1972-04-01), Ehrenfried et al.
patent: 3753200 (1973-08-01), Niejadlik
patent: 3783689 (1974-01-01), Ehrenfried et al.
patent: 3792407 (1974-02-01), Ehrenfried et al.
patent: 3921450 (1975-11-01), Pfister
patent: 3955416 (1976-05-01), Waiwood
patent: 4231025 (1980-10-01), Turner, Jr.
patent: 4382382 (1983-05-01), Wang
patent: 4601201 (1986-07-01), Oota et al.
patent: 4679432 (1987-07-01), Draeger
patent: 4685332 (1987-08-01), Betterton et al.
patent: 4702107 (1987-10-01), Guerrini et al.
patent: 4730489 (1988-03-01), Hoekstra
patent: 4745293 (1988-05-01), Christensen
patent: 4747062 (1988-05-01), Esau
patent: 4748846 (1988-06-01), Haynes
Page from Spectra Symbol Brochure describing SOFTPOT.TM. Membrane Potentiometer & SOFTSTICK.TM. Membrane Controller published in Dec. 1986 or earlier.
A Spectra Symbol Corporation Brochure on the SOFTPOT.TM. Membrane Potentiometer published Jan. 1987 or earlier.

Affiliated with

Also associated with

Rating

Differential pressure level sensor with temperature sensing elem does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Differential pressure level sensor with temperature sensing elem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential pressure level sensor with temperature sensing elem will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1377593