Water probe liquid electrode accessory for alarm detector alarm sensor (10pcs)

PH Sensor Module Probe Electrode PH Sensor Liquid PH Value Detection Sensor Module High-Accuracy PH Measurement Probe PH Sensor Probe For Water Testing PH Electrode Probe BNC Compatible With Arduino, AVR, PIC - RS7239PH Sensor Module Probe Electrode PH Sensor Liquid PH Value Detection Sensor Module High-Accuracy PH Measurement Probe PH Sensor Probe For Water Testing PH Electrode Probe BNC Compatible With Arduino, AVR, PIC - RS7239