Measuring and testing – Liquid level or depth gauge – Thermal type
Patent
1993-05-20
1994-08-23
Gutierrez, Diego F. F.
Measuring and testing
Liquid level or depth gauge
Thermal type
340622, G01F 2322
Patent
active
053396898
ABSTRACT:
A level sensing apparatus for detecting variations in heat transfer for measuring the level of a fluid in a container. The apparatus has a plurality of spaced Darlington pair transistor configurations within an elongate housing. The Darlington pair transistor configurations are so positioned in the housing and biased such that their conductivity is dependent upon the cooling effects of the fluid. A predetermined potential difference is provided across each one of the respective Darlington pair transistor configurations due to the cooling effects of the fluid when in a liquid form. A potential difference lower than the pre-determined potential difference is provided due to the cooling effects of the fluid when in a gaseous form.
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Gutierrez Diego F. F.
Pyrozone Manufacturing Pty. Ltd.
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