초록 ▼

A method and apparatus are disclosed for detecting the presence of very fine leaks through the walls of an enclosure which include a sniffer nozzle (1) open to the atmosphere, a vessel (5) having molecular sieves (4) therein for adsorbing substantially all gaseous products which have entered the sni

A method and apparatus are disclosed for detecting the presence of very fine leaks through the walls of an enclosure which include a sniffer nozzle (1) open to the atmosphere, a vessel (5) having molecular sieves (4) therein for adsorbing substantially all gaseous products which have entered the sniffer nozzle (1) with the exception of the probe gas which has been pressurized within the enclosure being tested, a pump system (8, 9) for creating vacuum conditions within the system, a mass spectrometer (12) for detecting the presence of the probe gas, and a capillary tube (2) interconnecting the nozzle sniffer (1) and the molecular sieve assembly whereby the probe gas draw rate, and sensitivity of the apparatus of the present invention, are significantly increased.

대표청구항 ▼

A system for determining leaks through the walls of an enclosure which has been charged with a probe gas, comprising: vacuum suction means for establishing a source of vacuum within said system; means fluidically connected to said vacuum suction means for detecting the presence of said probe gas; no

A system for determining leaks through the walls of an enclosure which has been charged with a probe gas, comprising: vacuum suction means for establishing a source of vacuum within said system; means fluidically connected to said vacuum suction means for detecting the presence of said probe gas; nozzle means open to the atmosphere for disposition outside of said enclosure walls so as to capture said probe gas leaking out from said enclosure through leak locations within said enclosure walls; porous adsorbent means fluidically connected to said gas detecting means for adsorbing substantially all gaseous products which have entered said nozzle means yet permitting said probe gas to pass through said porous adsorbent means to said gas detecting means; and capillary tube means connected to said nozzle means and said porous adsorbent means for defining a high flow rate of said probe gas within said system whereby the sensitivity and leak detection efficiency of said system is able to be rendered high.