Photoelectric sensing head with wiping means

Details Photoelectric sensing head with wiping means Photoelectric sensing head with wiping means

1977-04-04

1978-09-12

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Housings

356208, H01J 502

Patent

active

041140389

ABSTRACT:
A sensing head for use in turbidity measurements has a body with a sensing surface, for example a photocell enclosure, which is immersed in liquid in use of the head. Periodic cleaning of the sensing surface is effected by powered movement, for example under control of an electric motor, of the body relative to a housing in which a wiping element such as an O-ring is seated. As applied to a photoelectric head a further body enclosing a light source may be mounted for movement with the photocell enclosure to be wiped clean by a separate wiping element in the housing.

REFERENCES:
patent: 2866379 (1958-12-01), Veit
patent: 2892378 (1959-06-01), Canada
patent: 3731091 (1973-05-01), Rosso et al.

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