Method and apparatus for distinguishing between different substa

Details Method and apparatus for distinguishing between different substa Method and apparatus for distinguishing between different substa

1989-07-20

1990-11-06

Cuchlinski, Jr., William A.

Measuring and testing

Liquid level or depth gauge

Thermal type

374 10, 374 54, 340622, 210 86, 210744, 210742, G01F 2322

Patent

active

049675931

ABSTRACT:
A method for determining the level of heavier particulate waste material in a storage tank of liquid. The method comprises mounting a heated sensor below an unheated or reference sensor so that the reference sensor is influenced under some circumstances by the heater, but is insulated therefrom when the heated sensor is embedded in the particulate material. The invention includes the apparatus for accomplishing the method.

REFERENCES:
patent: 3923655 (1975-12-01), McKinney
patent: 4423629 (1984-01-01), Ara et al.
patent: 4440717 (1984-04-01), Bevilacqua et al.
patent: 4449403 (1984-05-01), McQueen
patent: 4603580 (1986-08-01), Waring
patent: 4720997 (1988-01-01), Doak et al.
patent: 4741209 (1988-05-01), McCulloch
patent: 4785665 (1988-11-01), McCulloch
patent: 4859076 (1989-08-01), Twerdochlib

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