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FEATURES: BNC Socket, 300cm long cable, comes with protective cap with storage bottle Comes with pH 4.00, pH 6.86 and pH 9.18 calibration powder. Replaceable electrode 0~14pH pH measuring range pH electrode is made of a silver chloride (Ag/AgCl) reference electrode to measure pH value of liquid Wide application but not limited to chemical engineering, pharmaceuticals, laboratory experiments, aquaculture, and hydroponics.