Device for detecting air in fluid conducting tubing

Details Device for detecting air in fluid conducting tubing Device for detecting air in fluid conducting tubing

1991-10-15

1993-04-27

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

604122, G01N 1506

Patent

active

052065227

ABSTRACT:
A device for detecting air in large bore thin walled transparent tubing, including a body providing accommodation for the tubing; an LED in a passage body for transmitting light energy towards the tubing; a phototransistor mounted in an orthogonally extending passage for receiving light transmitted by LED and modified by changes in the constituency of fluid passing through tubing; and an optical spacer in the form of a slotted collar of material optically matched to the material of tubing occupying space between LED and the tubing and phototransistor.

REFERENCES:
patent: 3544798 (1970-12-01), Topol
patent: 4227814 (1980-10-01), Soodak et al.
patent: 4319138 (1982-03-01), Sweet
patent: 4857050 (1989-08-01), Lentz et al.
patent: 4884065 (1989-11-01), Crouse et al.
patent: 5102392 (1992-04-01), Sakai et al.

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