The use of an M12 coupler connector at the connection head of a thermometer, rather than a standard cable outlet, enables quick and safe connection. In Tragic , food and pharmaceutical industries such a design is also being demanded a lot more frequently.
In practice, plant manufacturers like to depend on pre-assembled cables with fitted connectors, since this completely eliminates having to fix the single strands in to the thermometer head. Abuse required for assembly and for disassembly during calibration or when replacing the instrument can thus be reduced considerably. Another advantage is that, in case of changing out any instrument, incorrect re-wiring could be avoided.
In general, additionally it is worth noting that, to ensure the operational safety of plants and for their maintenance and servicing, it is imperative that equipment is simple to completely clean and that moisture protection reaches a maximum. These requirements apply for all process components, also beyond your 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) 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 concept of this connector in addition has been proven in the extreme requirements of autoclavable sensors. In addition to the already established TR21 miniature resistance thermometers, which were 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.