The Hach Pocket Pro ORP Tester is the convenient and easy to use solution to water testing for oxidation-reduction potential. Take the guesswork out of water maintenance, and use the digital tester that is easy to calibrate with accurate results that use built in diagnostics. This tester operates off of 4 easy to replace AAA batteries. Not only is this tester easy to use, but it can also be operated in other languages including French, German, Italian, and Spanish.
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