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HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc: Amazon.com: Industrial & Scientific
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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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Amazon.com: 2024 Upgraded TDS Meter Digital Water Tester, DUMSAMKER Professional 3-in-1 TDS, Temperature and EC Meter with Carrying Case, 0-9999ppm, Ideal ppm Meter for Drinking Water, Aquariums and More : Patio, Lawn
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