Why does my Vapor Pin® Sampling Device fail a helium leak test?

When the Vapor Pin® Sampling Device is failing a helium leak test, you should look for false positives from methane.  Most helium detectors respond positively to methane. High concentrations of C5-C12 hydrocarbons in soil gas have been reported to also cause false positives in helium detectors. When using a helium detector, we recommend using a model that does not respond to methane, and test the soil gas for false positives before applying helium. Please use the links below for testing for leaks via mechanical means!

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