.nucalgon.com/products/specialty/visible-defects I bought this system from the original seller years ago when I was in business. I have two gallons of fluid with it as well. I will post some actual pictures later this week of my kit.
NEW IMPROVED "DIGITAL"ELECTRIC STETHOSCOPEThrough the use of digital technology, you now have the ability to detect weak signals from leaking water pipes and gas lines. Digital technology eliminates threshold noise generated by other circuits that could mask the weak sounds generated by a leaking water (producing a "rushing sound") or gas line (producing a "hissing" sound).
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