Milwaukee MW802 PRO 3-in-1 pH, EC, TDS Combo Meter with ATC
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Amazon.com: Milwaukee MW802 LED Economy Portable pH/EC/TDS Meter with 1 Point Manual Calibration, 0.0 to 14.0 pH, +/-0.1 pH Accuracy, +/-0.2 pH Resolution : Industrial & Scientific
Milwaukee MAX MW170 MAX pH/ORP/EC/TDS/NaCl/Temp Logging Bench Meter
Amazon.com: Milwaukee BEM802 Combination pH/EC/TDS Meter with 110V Power and Mounting Kit, 0.00 to 14.00 pH, +/-0.20 pH Accuracy : Industrial & Scientific