Replacement Electrode for pH Spear, Double junction spear, 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 ABS Plastic, Diameter 1 in, Length 130 mm, Cable Length Direct connect, Connector OAKTON Connector, Amplifier No, Temp. Sensor None, Max. Pressure Ambient, For Use With OAKTON pH Spear, Standards NIST or USA, Shelf Life 6 mo, Junction Double junction spear, Includes Electrode