Absolute capacitance manometers

Details Absolute capacitance manometers Absolute capacitance manometers

1987-05-18

1988-11-22

Noland, Tom

Measuring and testing

Fluid pressure gauge

Diaphragm

G01L 912

Patent

active

047856696

ABSTRACT:
A single fluid-pressure transducer unit, of the type in which sensed electrical capacitance is varied in accordance with electrode deflections induced by pressure changes, is rendered capable of characterizing a wide range of pressures extending from near-vacuum to atmospheric levels, with the aid of a distinctive composite-electrode capsule which interacts uniquely with a conventional type of sheet-metal diaphragm. While sensing relatively low pressures, the exhibited capacitance of the transducer is essentially that appearing between the diaphragm and a nearby electrode carried by the capsule, but, at or near atmospheric pressure, the diaphragm physically engages and deflects that electrode, which is elastically deformable, causing it to vary a further capacitance appearing between that deformable electrode and a companion stationary electrode which is also part of the capsule.

REFERENCES:
patent: 3484732 (1969-12-01), Postma
patent: 4390925 (1983-06-01), Freud
patent: 4425799 (1984-01-01), Park
patent: 4499773 (1985-02-01), Crampton et al.

Affiliated with

Also associated with

Rating

Absolute capacitance manometers does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Absolute capacitance manometers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Absolute capacitance manometers will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-428338