Oakton AO-35634-35 Oakton PCTSTestr 50 Waterproof Pocket pH/Cond/TDS/Salinity Tester, Premium 50 Series
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Battery: four aaa 1.5 v
Buffer recognition: usa 4.01, 7.00, 10.01 and nist 4.01, 6.86, 9.18
Calibration: up to 3 points
Conductivity accuracy: 1 percent full scale
Display type: lcd
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