Patent ID: 6595048
Filing Date: 2003-07-22
Classification: F17C,G01F

Abstract:
A system for dispensing cryogenic liquid only of an acceptable purity to a use device comprising:a) a sump; b) a primary flow meter positioned within the sump, said sump filled with cryogenic liquid to a level such that the flow meter is submerged in the cryogenic liquid; c) a dispensing hose in communication with the sump and the flow meter for dispensing the cryogenic liquid in the sump to the use device; d) a temperature probe submerged within the cryogenic liquid in the sump so that a temperature for the cryogenic liquid is obtained; e) means for measuring a characteristic of the cryogenic liquid relating to purity; and f) means for comparing the characteristic of the cryogenic liquid with a corresponding characteristic of a pure cryogenic liquid at the temperature of the cryogenic liquid to determine the purity of the cryogenic liquid.