1. Digital PH Meter, PH Meter 0.01 PH High Accuracy Water Quality Tester with 0-14 PH Measurement Range for Household Drinking, Pool and Aquarium Water PH Tester Design with ATC
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2. Apera Instruments AI311 Premium Series PH60 Waterproof pH Pocket Tester Kit, Replaceable Probe, ±0.01 pH Accuracy
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3. Bluelab METCOM Combo Meter for pH, Temperature, and Conductivity Measures, Easy Calibration
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4. Apera Instruments AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy, 0-14.0 pH Range
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5. Dr.meter 0.01 Resolution High Accuracy Pocket Size pH Meter with ATC, 0-14pH Measurement Range
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6. HM Digital HMDPHM80 Digital pH/Temperature Meter, 0.0-14.0 0.1 Resolution, Purple
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7. Milwaukee Instruments 716690 ph Controller
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8. Apera Instruments Premium-Series PH60S Food pH Pocket Tester Kit, Swiss Spear pH Electrode, ±0.01 pH Accuracy, -2.00-16.00 pH Range
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9. VIVOSUN pH and TDS Meter Combo, 0.05ph High Accuracy Pen Type pH Meter +/- 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter
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