Liquid level sensor assembly

Details Liquid level sensor assembly Liquid level sensor assembly

1990-10-23

1991-07-09

Yasich, Daniel M.

Measuring and testing

Liquid level or depth gauge

With illumination

250577, 340619, G01F 2302

Patent

active

050294717

ABSTRACT:
A liquid level sensor assembly for a liquid-chemical bubbler includes a removable cylindrical LED housing, which is removably retained within a cylindrical axial bore of a sealing nut. The LED housing is removable from within the cylindrical axial bore without breaking the seal between the chemical liquid within the bubbler and the ambient atmosphere. The LED housing holds an LED transmitter and a photodiode detector, which respectively sends light into a cylindrical quartz rod and receives reflected light from the quartz rod, where the reflected light is used to measure the level of the chemical liquid within the bubbler.

REFERENCES:
patent: 3834235 (1974-09-01), Bouton et al.
patent: 4899585 (1990-02-01), Kulha
patent: 4961069 (1990-10-01), Tsaprazis

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