Direct Connect Electrode, Single-Junction/Spear Tip, Testing Parameter pH, Measurement Range 0-14 pH, pH Range 0-14 pH Units, Tip Shape Spear Tip, Operating Temp. Range 0 Degrees to 100 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 pHTestr 1, OAKTON pHTestr 2, Standards NIST or USA, Shelf Life 6 mo, Reference Combination Electrode, Junction Single