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Nh4+ Electrode, pH Electrode, K+ Electrode, ORP Electrode, Nh4-N/pH/ORP/K+ Combo Sensor, Find Details and Price about Ammonium with pH Sensor Nh4+Electrode from Nh4+ Electrode, pH Electrode, K+ Electrode, ORP Electrode, Nh4-N/pH/ORP/K+ Combo Sensor - Broadsensor Technologies Co., Ltd