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Helium Detector for Air Sparge Pilot Test

Helium Detector for Air Sparge Pilot Test

Helium Detector for Air Sparge Pilot Test

(OP)
Greetings,

I am designing an air sparging pilot test in which helium will be used as a tracer gas.  The helium will be mixed with air and sparged into a well, and observation and monitor wells will be checked for helium.  No SVE will be performed, just monitoring the well casing for helium gas.  Can anyone recommend a helium detector to use for this application?  I have a source that recommends a Marks Product helium detector (which I imagine refers to the 9821 or 9822 model).  I've had trouble finding a local company that has these to rent, plus the article that recommended them is from 2002, and I thought perhaps a newer or more common detector might be available.

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