Electrochemical Oxygen Detector or Hospital Environment in IP55 Box. Works both for excess or deficency. Only compatible with the connection module G7-42 for 4-20 mA. The detector is equipped with an electrochemical cell head that measures the oxygen concentration in volume percentage in the air. The detectors is delivered with pre-set Pre-alarm and Alarm thresholds for fast commissioning. The sensor is suitable for hospitals, clean rooms etc.