For use with Oxi 3xxi, ProfiLine Oxi 1970i, ProfiLine 3205, 3210, 3310. Membrane-covered oxygen sensor with low flow requirement and removable cage guard, for field applications (fish farm revival pools) and for educational purposes. Ready to measure - no polarisation time. IMT compensation via two integral temperature sensors. Service life with one electrolyte filling approx. 6 months. Minimal flow requirement. No zero current. Sensor is watertight (IP 68 - 2). Standard with 3m cable and watertight plug. Standard with calibration/storage vessel OxiCal® -D. Standard with cage guard SK-D.