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TDS-3 2 in 1 TDS/Temp Tester 0-9990 ppm TDS Meter Water Quality Monitor Purity Analyser Automatic Calibration for Pool Aquariums
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Milwaukee EC60 PRO Waterproof 3-in-1 Conductivity / TDS Tester with Thermometer and Replaceable Probe
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Amazon.com: HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 ppm TDS Measurement Range, 1 ppm Resolution, +/- 2% Readout Accuracy : Industrial & Scientific
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