Retractable Sensor Housings

The Intrac series are high performance sensor housings for applications with very demanding conditions. Those retractable housings are available with manual as well as pneumatic operation, allowing safe operation of the housings in potentially harmful environments. If there's no sensor in a housing and the insertion rod is moved to the measurement position, process media can easily enter and escape from the housing. To prevent this, if there's no sensor in an in-track housing, the housing's insertion rod is locked and cannot be inserted into the process. Inserting a sensor into the housing releases the insertion rod by pulling the locking pin on the manual version or applying pressurized air for the pneumatic version. The insertion rod and sensor can then be moved to the measurement position. The patented design of the immersion tube ensures safe containment of the process medium during sensor insertion and retraction procedures. The O-rings that seal against the process media are fitted in the fixed part of the immersion tube. Compared to solutions that have the O-ring sealings mounted on the movable immersion tube part there are a number of benefits. O-rings are less exposed to the process medium, a scraper ring at the end of the housing removes coarse dirt as the sensor is retracted, the sealing function is available at any time. A position rod prevents the immersion tube from rotating, keeping it in an optimized position to flush the sensor. The end of the immersion tube features a cage that protects the sensor from being damaged by debris or particles in the process. As the immersion rod cannot be rotated, perfect positioning of the cage in the process is always ensured. The big advantage of a retractable housing is the ability to clean and calibrate a sensor during a running process. Intrac housings are available with a single flushing chamber or a double flushing chamber. The double flushing chamber allows sterilization of all the housing's wetted parts outside of the process. The flushing chamber has an approximate volume of 3 CL. It has three connection points with a G18 thread for inlet, outlet and temperature control. Due to the wide range of possible applications for the Entrac housings, a large variety of process connections are available, ranging from the often used INGOLD sockets and various flange adapters to special hygienic connections. Numerous Mettler Toledo pH, ORP, conductivity and O2 sensors can be operated and automatically cleaned or calibrated with the Entrac housings. Eliminate the risk of accidents during cleaning in place, calibration, and replacement of analytical sensors during a running process with Intrack 767, 777, and 779 housings. To learn more, please visit www.mt.com slash Intrack 777X.