Measuring and testing – Volume or rate of flow – By counting drops – bubbles – or particles
Patent
1985-03-06
1987-07-21
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By counting drops, bubbles, or particles
356338, 604253, G01F 1300, A61M 514
Patent
active
046809775
ABSTRACT:
An improved optical flow sensor for optically detecting and measuring the flow of a fluid through a drip chamber assembly. The sensor comprises an optical energy-emitting chip sealed within a first lens block having a refracting lens in one surface and an optical energy detecting chip sealed within a second lens block having a refracting lens in one surface. The two lens blocks are positioned on the two parallel arms of a "U"-shaped base with their lens surfaces facing each other across the open space between the arms of the "U". The drip chamber assembly has transparent walls defining a drip chamber, and the lenses compensate for the refractive effects of the walls of the drip chamber assembly on the optical energy passing through. As drops of fluid fall through the chamber, they intersect the optical energy passing through the chamber and produce a corresponding output signal from the detector.
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Conero Ronald S.
Landis Terry L.
Goldstein Herbert
IVAC Corporation
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