pH Electrode, Double-Junction/Refillable, Testing Parameter pH, Measurement Range 0-14 pH, pH Range 0-14 pH Units, Tip Shape Round, Operating Temp. Range 0 Degrees to 80 Degrees C, Body Material Glass, Diameter 12mm, Length 130 mm, Cable Length 3 ft, Connector BNC, Amplifier No, Temp. Sensor None, Max. Pressure Ambient, For Use With OAKTON pH 510 Meter, Standards NIST or USA, Shelf Life 6 mo, Reference Combination Electrode, Junction Double, Electrolyte Redox