Probe for monitoring liquid with protection against leakage

Details Probe for monitoring liquid with protection against leakage Probe for monitoring liquid with protection against leakage

1996-02-15

1997-09-23

Biegel, Ronald L.

Measuring and testing

Liquid level or depth gauge

Immersible electrode type

738665, 73304C, G01F 2300

Patent

active

056692633

ABSTRACT:
In the presence of a defect in the insulation cover of known probes, liquid medium can leak from the container into the interior space of the housing of the probe, and from there into the surrounding environment, and endanger or even injure persons present there. The probe housing has an interior space with two chambers. The first chamber, which is close to the container, is capable of withstanding the pressure prevailing in the container. A passage opening present between the first chamber and the second chamber for the sensor electrode, or for its electrical conductor, is closed by a movable closing part or a stationary closing element. In the event of leakage through the insulation cover, the pressure would be transmitted from the container into the first chamber, but could not propagate from there into the second chamber and on from there. In this way, in the event of a defect, medium that is discharged under the operating pressure prevailing in the container, is prevented from flowing through the probe housing and into the environment, where it would become a hazard to persons present there.

REFERENCES:
patent: 4507521 (1985-03-01), Goellner
patent: 5304985 (1994-04-01), Cosser
patent: 5391839 (1995-02-01), Lang et al.
patent: 5481197 (1996-01-01), Sanders et al.

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