Patent ID: 6058776
Filing Date: 2000-05-09
Classification: G01F

Abstract:
A conductivity metering device mountable in a metallic container for detecting a fluid level of the container, comprising:a piston forming a part of one of hydraulic and pneumatic piston and cylinder arrangement for disposing in an opening of the container;a probe body attached to the piston, wherein when the probe body is in an operative position the probe body can be introduced into an inner space of the container so as to detect the presence of fluid contained therein, wherein when the probe body is in a nonoperative position the probe body can be retracted from the inner space of the container and an overpressure is applied to the arrangement so as to prevent fluid from entering into the cylinder;an insulating coating disposed on an outer surface area of the probe body; anda sealing ring, disposed along an inner surface of the opening, contacting the insulating coating when the probe body is retracted, wherein when the sealing ring contacts the insulating coating during retraction of the probe body, the outer surface of the probe body is cleaned.