Milwaukee PH55 pH Waterproof Dual Level Tester

Milwaukee Instruments PH55 pH Waterproof Dual Level Tester, Unit comes with Automatic Temperature Compensation (ATC), 2 Points Automatic Calibration, ± 0.1 pH Accuracy; Range; -2.0 TO 16.0 pH -- 7.01 & 4.01 pH Starter Calibration Solution -- Replacement Probe Model is Mi56p ( PH 55 )