APEC TDS Meter Digital Water Quality TDS Test Kit Meter With Carrying Case, 0 To 1999 Ppm Measurement Range, 1 Ppm Resolution, +/- 2% Readout Accuracy

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HM Digital TDS-3 Handheld TDS Meter With Carrying Case, 0 - 9990 Ppm TDS Measurement Range, 1 Ppm Resolution, +/- 2% Readout Accuracy

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Extech CL200 Exstik Waterproof Chlorine Meter

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