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DescriptionSMR and SPR Series magnetic non-contact safety switches with universal 22 mm (0.87") fitting have been designed to enable the conformance to EN60947-5-3 and be used as directed by ISO12100, ISO14121 and EN60204-1. They have magnetic sensing which provides a wide sensing distance and provides a high tolerance to misalignment after sensing. They can operate from 4 directions even in extreme environments of temperature and moisture. They have volt free high power switching capability and can be used independently to switch low risk applications or connect to a safety relay to provide higher safety levels. When used in combination with most dual channel safety monitoring relays they can be used to provide up to PLe/Category 4 to ISO13849-1.