Waterproof Ammonia Electrode AMMONIA HIGH PERFORMANCE ELECTRODE W/ WATER PROOF BNC CONNECTOR Testing Parameter Ammonia Measurement Range 0.01 to 17 000 ppm pH Range 0-14 Tip Shape Flat Operating Temp Range 0 Degrees to 80 Degrees C Body Material Epoxy Diameter 12mm Length 120 mm Cable Length 1 m Connector BNC Amplifier none Temp Sensor No Max Pressure Atmospheric For Use With Any ISE Meter with BNC Input Shelf Life 36 mo from manufacture Junction Membrane