Apparatus for determining interface levels in ground cavities or

Details Apparatus for determining interface levels in ground cavities or Apparatus for determining interface levels in ground cavities or

1976-01-13

1976-09-14

Swisher, S. Clement

Measuring and testing

Liquid level or depth gauge

G01F 2316

Patent

active

039799581

ABSTRACT:
An apparatus is provided for determining the location of a liquid-liquid or a liquid-gas interface in tanks or cavities and has particular use in determining the position of the explosive collar level in boreholes charged with water gel explosives. The apparatus consists of a sensing element which may be lowered into a cavity. Air is exhausted from the sensing element into the surrounding medium. Any restriction to air flow caused by the surrounding medium causes an increase in air pressure which increase signals the presence of an interface.

REFERENCES:
patent: 3213670 (1965-10-01), MacGeorge

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