George Risk Industries 502 Micro Surface-Mount Magnetic Contact

Add hardwired opening detection to a protected door, cabinet, enclosure, or access panel with a compact magnetic contact set that mounts on the surface rather than requiring a recessed installation. The SPST-NO contact changes state in response to its mating magnet, providing a simple input for a compatible alarm, monitoring, or access-control circuit. A 1/4 in gap gives installers a defined alignment target between the contact and magnet. The micro contact format suits locations where a small surface-mounted sensor is required and where lead routing needs to exit from the side of the assembly. Side-exit 26 AWG wire leads support direct connection into low-voltage security wiring without requiring a separate terminal block at the sensor. The white finish helps the device blend with many light-colored frames, doors, cabinets, and finished surfaces. George Risk Industries 502-W is a switch set rather than a contact-only component, pairing the magnetic sensing contact with its mating magnet for the protected-opening application. Within the 502 contact family, this version is distinguished by its surface-mount micro format, normally open SPST circuit, side-lead configuration, and 1/4 in operating gap. Match the contact position, magnet alignment, and circuit requirements to the controlled opening before installation.