Optical fluid pressure sensor

Details Optical fluid pressure sensor Optical fluid pressure sensor

1984-05-04

1985-12-03

Woodiel, Donald O.

Measuring and testing

Fluid pressure gauge

Photoelectric

250231P, G01L 700

Patent

active

045559490

ABSTRACT:
An optical pressure sensor including a light source, a light detector and a capillary system positioned in the light path between the light source and detector. The capillary system inlet receives liquid from the external source to be monitored, and the outlet is closed or connects with a closed gas reservoir. Light absorbing liquid forced by liquid pressure into the capillary system absorbs a portion of light corresponding to the area occupied by the liquid. This reduces the output of the light detector in an amount functionally related to the liquid pressure.

REFERENCES:
patent: 2521784 (1950-09-01), Garis
patent: 3209596 (1965-10-01), Kelly
Teodorescu, "Linear Displacement Sensor Uses Liquid Crystal Cell", Electronic Engineering, vol. 47, No. 570, p. 9.

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