The Series AZ16zi are designed for use with movable machine guards which must be closed for operator safety. Their tamper-resistant design, and positive-opening NC contacts, provide a significantly higher level of safety than conventional spring-driven switches whose contacts can weld/stick shut. Their IP67 rating makes them ideal for interlocking safety guards in hostile environments. -Contacts: 1 NC; 1 NO & 1 NC; 2 NC; 1 NO & 2 NC