4 in 1 multifunction can be used to test PH, TDS, EC and TEMP of water. TDS: 1 to 9999ppm. EC: 1 to 19999us/cm. EC: 1us/cm. PH: 0.00 to 14.00pH. pH: 0.01pH. pH: ±0.05pH. pH 6.86 point: Accuracy ±0.1pH.
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