Low pressure cryogenic fluid sampling system

US12055465B2 · kind B2 · utility

Inventor

• Siegfried Mueller · Großingersheim, DE

Key dates

• Filing date: Dec 29, 2021
• Grant date: Aug 6, 2024
• Expiry date: Jun 9, 2042

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2001/2071
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A low-pressure cryogenic fluid sampling system includes a cryogenic sample handle assembly; a transfer and vaporization tubular loop; and a sample vessel. The sample handle assembly connects to a cryogenic storage vessel containing a cryogenic fluid. The tubular loop connects to the cryogenic sample handle assembly. The sample vessel removably connects to the transfer and vaporization tubular loop and accommodates a gaseous sample having a pressure lower than about 200 kPa. A method of collecting a gaseous sample with the sampling system includes purging the sample vessel; actuating the handle to purge and refrigerate the tubular loop; extracting a volume of a cryogenic fluid from the storage vessel into the loop to vaporize the cryogenic fluid and produce a gaseous sample; and transferring the sample from the tubular loop into the sample vessel. The sampling system is safer, maintains stoichiometric quantities in the cryogenic liquid, and reduces cross contamination.