TDS Meter Digital Water Tester, Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water
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HM Digital TDS-3 Handheld TDS Meter with Carrying Case with 0 – 9990 ppm (mg/L) Range and +/- 2% Accuracy
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