$170.00 Hanna HI 98129 pH EC TDS Conductivity Tester Meter, HI98129 – NISupply
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Hanna Instruments HI98301 DiST1 EC and TDS Tester, 0.5 TDS Factor, 1999 mg/L (ppm), 1 mg/L (ppm) Resolution, +/-2% Accuracy: Multi Testers: Amazon.com: Tools & Home Improvement
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