Connector Types Waterproof 8-pin DIN Description 4-Electrode Conductivity Cells Diameter (English) Body 0.59 in. Diameter (Metric) Body 15mm For Use With Orion 1230, 555A, 550A, 550, 162A, 162, 142, 136S, 135A, 131S, 130A, 128 meters Length (English) Cable 10 ft. Length (Metric) Cable 3m Material Rugged epoxy body Min. Immersion 35mm Sensor Types 4 electrode graphite cell Storage Method Store in distilled or deionized water between measurements, for overnight or long-term storage, thoroughly rinse and store dry Probe ATC