Level and interface detection

Details Level and interface detection Level and interface detection

1982-03-09

1984-09-11

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Fluent material level signalling

250368, G01F 2300

Patent

active

044712235

ABSTRACT:
Method and apparatus to determine the position of a liquid/liquid or liquid/vapor interface in a remote inaccessible location, for example in undersea oil storage tanks, by exposing the liquids or liquid and vapor to gamma-radiation from a source adjacent to or within the vessel containing the liquid(s) and monitoring the gamma-radiation issuing from the liquids or liquid and vapor, and using long lengths of optical fibre to convey the signals received to a measuring instrument. The invention employs optical fibres which may be up to several hundred meters long and among its advantages is the need for no moving parts, electrical supply or electronics at the remote location.

REFERENCES:
patent: 3138709 (1964-06-01), Cassen et al.
patent: 3668392 (1972-06-01), Bajek et al.
patent: 3794428 (1974-02-01), Giesecke
patent: 4155013 (1979-05-01), Spiteri
patent: 4267819 (1981-05-01), Claesson
patent: 4292628 (1981-09-01), Sadler

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