JPH0225831U

JPH0225831U -

Info

Publication number: JPH0225831U
Application number: JP10355588U
Authority: JP
Priority date: 1988-08-04
Filing date: 1988-08-04
Publication date: 1990-02-20

Description

[Brief explanation of drawings]

第１図は本考案の一実施例の分解斜視図である
。１：ケース、３：プリズム、４：ホルダ、５：
通路、７：透孔、８：信号処理回路、９：基板、
１０：発光素子、１１：受光素子、１３：リード
線。 FIG. 1 is an exploded perspective view of an embodiment of the present invention. 1: Case, 3: Prism, 4: Holder, 5:
passage, 7: through hole, 8: signal processing circuit, 9: substrate,
10: light emitting element, 11: light receiving element, 13: lead wire.

Claims

[Scope of utility model registration request]

A light emitting element and a light receiving element are arranged side by side on the back surface of the prism, and when the outer surface of the prism is in contact with air, the light emitted from the light emitting element is reflected on the other two surfaces of the prism and is received by the light receiving element. When the outer surface of the prism is in contact with the liquid, the light emitted from the light-emitting element is refracted out of the prism and is not received by the light-receiving element, causing the liquid surface to touch the outer surface of the prism. In a liquid level sensor configured to detect whether or not the liquid level has been reached, the prism is fixed to the tip of a cylindrical case, and the prism is inserted into a plurality of longitudinal passages formed at the front end of an elongated holder made of an insulating material. The lead wires of both elements are passed through each separately, and a board on which a signal processing circuit is formed is fixed to the rear end to connect the lead wires, and both the elements and the holder are fitted from the rear end of the case. Liquid level sensor.