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APERA INSTRUMENTS AI209 Value Series PH20 Waterproof pH Tester Kit, ±0.1 pH Accuracy & 3M KCL Storage Soaking Solution (8 oz.) for pH and ORP Electrodes: Amazon.com: Industrial & Scientific
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Digital PH Meter - pH Meter With Thermal Printer - 5Points Calibration Manufacturer from Chennai
Digital Ph Meter Tester Water Wine Urine Monitor Accuracy 0.01 Automatic Calibration Ph 0-14 Temp 0-80 ℃ For Aquarium Pool Water - Ph Meters - AliExpress
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