The usage of an M12 coupler connector at the connection head of a thermometer, rather than standard cable outlet, enables quick and safe connection. In the hygienic, food and pharmaceutical industries such a design can be being demanded a lot more frequently.
In Fundamentals , plant manufacturers like to depend on pre-assembled cables with fitted connectors, since this completely eliminates having to fix the single strands into the thermometer head. Enough time required for assembly and for disassembly during calibration or when replacing the instrument can thus be reduced considerably. Happy is that, in case of changing out any instrument, incorrect re-wiring can be avoided.
In general, it is also worth noting that, to guarantee the operational safety of plants and for his or her maintenance and servicing, it is imperative that equipment is easy to completely clean and that moisture protection is at a maximum. These requirements make an application for all process components, also outside the process (in the ?splash zone?).
Note
WIKA has adapted the full-metal M12 coupler connector, familiar from the TR21 (TR21-A, TR21-B, TR21-C) products, to the cable outlet for thermometers with connection head and therefore enabled a simple and reliable reference to a 4-pin M12 connection cable. The high-quality sealing idea of this connector has also been proven in the extreme requirements of autoclavable sensors. In addition to the already established TR21 miniature resistance thermometers, that have been designed for the high IP requirements of sanitary applications, WIKA now offers thermometer products with connection heads ? models TR20, TR22 (TR22-A, TR22-B), TR25 ? with Sale for the hygienic, food and pharmaceutical industries.