G - Physics – 08 – B
Patent
G - Physics
08
B
340/145
G08B 21/00 (2006.01) G01M 3/32 (2006.01)
Patent
CA 2010474
APPARATUS FOR ELIMINATING MEASURING INACCURACIES IN A STORAGE TANK LEAK DETECTION SYSTEM ABSTRACT OF THE DISCLOSURE An improved apparatus for substantially eliminating measuring inaccuracies in a storage tank leak detection system caused by temperature-induced volumetric changes in the stored fluid product is described. The apparatus comprises an elongated tube supported in the storage tank and having first and second ends and a substantially hollow core. The apparat- us also includes a housing supported in the storage tank for receiving the second end of the elongated tube. The housing is vented to the fluid product such that a portion of the fluid product enters the housing. According to the invention, a medium is supported in the substantially hollow core of the elongated tube, the medium having a temperature coefficient substantially lower than the temperature coefficient of the fluid product. The apparatus also includes a non-reactive liquid barrier seal supported in the housing between the medium and the fluid product for preventing mixing of the medium and the fluid product and for supporting the medium in static equilibrium with respect to the fluid product. The large disparity between the temperature coefficients of the medium and the fluid product insures that temperature-induced volumetric changes in the fluid product do not vary the level of the medium in the tube. - 25 -
Kirby Eades Gale Baker
Lagergren Peter J.
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