such as RO and DI

Replaceable pH electrode Mi56P

alerting you to drift that could cause nutrient lockout and reduced yields

Display: Large digital LCD

HM Digital TDS Tester – Pocket-Size Water Quality Meter, Factory Calibrated polarographic probe such as RO and DIHM Digital TDS Tester Affordable, Accurate Water Quality Testing The HM Digital TDS Tester is a compact, easy to use meter designed for quick and reliable Total Dissolved Solids (TDS) measurement. Whether you're testing drinking water, monitoring a hydroponic reservoir, checking aquarium water quality, or verifying RO filter output, this pocket sized tester delivers instant results without breaking the budget. Key Features Measures Total Dissolved