Device for pneumatically scanning the level of liquid in a conta

Details Device for pneumatically scanning the level of liquid in a conta Device for pneumatically scanning the level of liquid in a conta

1980-10-06

1982-12-21

Woodiel, Donald O.

Measuring and testing

Liquid level or depth gauge

Exploring tube

73 375, 73301, G01B 1314

Patent

active

043642705

ABSTRACT:
A device for pneumatically scanning the level of liquid in a container, such as small housings for electronic components which are to be filled with casting resin, has a pneumatic scanning nozzle disposed above the component housing for directing an extremely low pressure air stream at the liquid surface in the housing. The nozzle has a branch conduit leading to a piston movable to actuate a proximity switch for providing a signal to cease the supply of liquid to the container. When a pre-determined liquid level is attained in the container, the back pressure through the conduit moves the piston against a spring bias to actuate the proximity switch. The liquid level is thus determined in a contact-free manner so that the measuring system remains untouched by the casting resin.

REFERENCES:
patent: 2891686 (1959-06-01), Roberson et al.
patent: 3459035 (1969-08-01), Russon

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