EXTECH Water Quality Meter: 0.00 to 14.00, Auto Temp Compensation, 32° to 194°, Dual Line LCD, 2 or 3 pt - 61HZ77|PH90 - Grainger
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Handheld Az86031 Water Quality Meter Ph Meter Oxygen Tester Ph Conductivity Salinity Temperature Meter - Ph Meters - AliExpress
EXTECH Multifunction Water Quality Meter: Handheld, -2 to 19.99, 0 to 199.9 mS, 0 to 100 g/L, Auto - 4TXG6|DO700 - Grainger
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