Level measuring system using admittance sensing

Details Level measuring system using admittance sensing Level measuring system using admittance sensing

1978-11-24

1980-11-04

Caldwell, Sr., John W.

Communications: electrical

Continuously variable indicating

With meter reading

73304C, 324 60C, 324 61P, 34084011, 34084016, G08C 1910, G01R 2700

Patent

active

042323002

ABSTRACT:
A transmitting system including an admittance sensing probe having sensing elements adapted to sense both the composition and the level of materials. The probe is coupled to admittance responsive networks forming part of a common oscillator which generate admittance signals representing the level and composition of the material. A remotely located power supply provides current to the transmitters through two pairs of lines, and the output currents of the transmitters represent the level and composition of the materials.

REFERENCES:
patent: 2136900 (1938-11-01), Woolley
patent: 3537085 (1970-10-01), Mayer et al.
patent: 3587076 (1971-06-01), Grover
patent: 3746975 (1973-07-01), Maltby
patent: 4021707 (1977-05-01), Ehret et al.
patent: 4064753 (1977-12-01), Sun et al.
patent: 4146834 (1979-03-01), Maltby et al.

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