The use of an M12 coupler connector at the bond head of a thermometer, rather than a standard cable outlet, enables quick and safe connection. In Sizable , food and pharmaceutical industries such a design can be being demanded ever more frequently.
In practice, plant manufacturers prefer to depend on pre-assembled cables with fitted connectors, since this completely eliminates needing to fix the single strands in to the thermometer head. Enough time necessary for assembly and for disassembly during calibration or when replacing the instrument can thus be reduced considerably. Another advantage is that, in the event of changing out any instrument, incorrect re-wiring could be avoided.
In general, it is also worth noting that, to ensure the operational safety of plants and for his or her maintenance and servicing, it is imperative that equipment is easy to clean and that moisture protection reaches a maximum. These requirements apply for all process components, also outside the process (in the ?splash zone?).
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WIKA has adapted the full-metal M12 coupler connector, familiar from the TR21 (TR21-A, TR21-B, TR21-C) product line, to the cable outlet for thermometers with connection head and therefore enabled a straightforward and reliable connection with a 4-pin M12 connection cable. The high-quality sealing concept of this connector has also been proven in the extreme requirements of autoclavable sensors. As well as Exposed 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 a hygienic M12 coupler connector for the hygienic, food and pharmaceutical industries.