Detecteur de liquides opto-electrique

Optical-electrical liquid probe

Abstract

ABSTRACT OF THE DISCLOSURE: An optical-electrical liquid probe for sensing the presence or absence of a liquid comprises a light emitter and a light receiver housed within a translucent hollow body. When there is no liquid adjacent a sensing part of the body, the light rays from the emitter pass to the receiver by refraction through the walls of the body. The presence of liquid adjacent the sensing part of the body causes the light rays to be refracted in such manner that they no longer reach the receiver with the result that the state of the receiver changes.

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