As many customers of IFM Electronic have already found, it is no longer necessary to rely on mechanical devices alone in safety applications. In 2004 there was only one, but now there is a whole family of inductive sensors from the company that are safe to use in a Category 4 (EN954-1) or SIL3(EN/IEC61508) situations.
The range now covers rectangular (40x40mm) types, both flush and non-flush-mounted, M30 and M18 devices. The M30 is available in a version for safe use in hazardous areas (safety Category 3 and ATEX3D/3G). The Category 4 M30 model is designed with food washdown environments in mind, being constructed from stainless steel and PEEK -- with an IP rating of 69K.
These fail-safe inductive switches have full redundant and diverse internal circuits, certified by TÜV Rhineland, but otherwise they deliver all the advantages of an inductive sensor: with no moving parts, IP67 sealing, standard M12 connectors, etc.
For more information, visit " target="_blank">www.ifm-electronic.co.uk"