The Pilz -504222 Magnetic safety switch comes with two N/O contacts. The PSENmag non-contact magnetic safety switches are suitable for a wide variety of electronic and electromechanical relays and can be combined with all Pilz evaluation devices. Magnetic safety switches, are known for their durability and are suitable for a number of applications including safety entry gates for industrial applications, security, door access, dirty environments and any other application that requires a non-contact switch solution.