EKF built-in duct sensors are used to measure the temperature of liquids and gases in pipes, air ducts or tanks. A special installation fl ange (MF) is required when installing the sensor in an air duct. If the sensor is to be used in liquids, nickel-plated brass dip sleeves (THMs) are required. In aggressive media, the use of stainless steel (V4A) dip sleeves (THV) is recommended. Dip sleeves and installation flanges are not included in standard delivery and must be ordered separately as accessories.