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Amazon.com : HI98129 | Combo pH / EC / TDS / Temperature - Tester / Meter | Hanna Instruments .#GH45843 3468-T34562FD438973 : Patio, Lawn & Garden
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Hanna Lab - Learn How to Set Up and Calibrate the Hanna Instruments pH, EC, TDS Combo Tester HI98129 - YouTube
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Hanna Instruments HI98129 Meter, pH/EC/TDS/Temp, 10" Height, 11" Wide, 20" Length: Amazon.com: Industrial & Scientific
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HANNA HI98129 pH/Conductivity/TDS Tester; EC resolution: 1 µS/cm, TDS resolution: 1 mg/L (ppm) Range: 0 to 3999 ?S/cm | OMNICONTROLS
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