Mettler-Toledo InTrac 781/784 series of retractable sensor housings

In harsh industrial processes, the safety of workers, the plant and the environment is paramount. Insertion points for in-line sensors can represent a weak spot where leaking process media is a possible hazard. The InTrac 781/784 retractable sensor housings are designed to tolerate extreme process conditions.

An intelligent locking system ensures operating safety at all times. Without the presence of a sensor, the housing’s insertion rod cannot be deployed into the process. The locking system makes it possible to remove the probe only when the insertion rod is fully retracted. This avoids any unintended sensor removal when it is in the measuring position.

InTrac781 and 784 housings allow sensor maintenance and exchange without any interruption to the running process. The stainless steel version of the housing allows sensor deployment or retraction in up to 16 bar with no compromise to operator safety.

The design of the integrated cleaning chamber makes sensor cleaning more efficient. Four spray nozzles ensure thorough cleaning of the sensor tip, and the large chamber bore size means dirt and particles are thoroughly flushed out. Operation with Mettler-Toledo’s EasyClean systems is possible for fully automatic sensor cleaning, flushing and calibration.

Wetted parts are available in different materials (stainless steel 1.4404, alloy C-22, polymer PP, PEEK or PVDF), while various immersion lengths and type of process connection are also available. The housings meet all major standards for hazardous areas and pressurised equipment directive (PED 97/23/EC) requirements.