The TPI 605 vacuum gauge measures vacuum in microns for accurate evacuation of refrigeration systems.
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72-10285 - Combustible Gas Leak Detector with LCD Display
The TPI 721 is designed to find combustible gas leaks in pipes, fittings, regulators, etc.. Capable of displaying real ppm, stepped ppm and %LEL. Detects natural gas, propane, butane, etc..
72-10290 - Refrigerant Leak Detector
The TPI 750A leak detector is capable of detecting all existing refrigerants and blends including 404A, PURON® 410A and R-507. Selectable sensitivity for pinpointing tough to find leaks.
I've ordered several times from MCM and have always been very satisfied with their products, service and shipping.