Buy the best Refrigerant Identifier
We can only recommend ONE refrigerant identifier. And that is the Robinair 16009 134R DiscovR Refrigerant Identifier.
It is pricey you may think, but it’s ease-of-use and durability are top-notch. You can see from the reviews that it’s one of a kind.
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Please note that Environmental Protection Agency law requires certain individuals to be licensed before purchasing some refrigerants. You will be required to provide your certificate number or declare the item will be resold to an EPA certified technician on certain types of Refrigerant. (R-410A & R-134A are excluded from this.)