A new helium sniffing device for locating very fine leaks

Publisher Website
Google Scholar
Abstract
A new helium sniffing method for leak checking large vacuum vessels is described. The low sensitivity problem of the conventional helium sniffing method has been overcome by increasing the gas draw rate from around leaks into the detector up to about 0.1 Pa m3/s. The devised system consists of a flexible stainless steel capillary tube 0.6 mm i.d. and 10 m long, a sorption pump using molecular sieve, and a helium leak detector in series. This method is particularly useful for locating very fine leaks down to 10−11 Pa m3/s. Relevant theoretical considerations and experimental results are presented.

This publication has 0 references indexed in Scilit: