George Risk 150-12WG-B Recessed Contact Switch Spst-no

Product Description

The George Risk Industries 150-12WG-B is a recessed contact switch set configured in a single-pole, single-throw, normally open (SPST-NO) circuit arrangement with a 1/2-inch recessed form factor. This type of magnetic contact is commonly used in security, alarm, and access-control wiring to monitor the open or closed state of a door, window, hatch, or panel. Licensed electricians and low-voltage security technicians install these contacts as part of intrusion detection or door-monitoring systems. The recessed design keeps the switch concealed within the door frame or panel edge for a clean, tamper-resistant installation.

The 150-12WG-B is suited for residential and light commercial applications where a flush-mounted, hidden contact point is required. Typical install scenarios include entry doors, utility access panels, electrical enclosures, and equipment housings where surface-mount contacts are impractical or undesirable. The switch set includes both the magnet and contact body as a matched pair.

Key Features

• SPST-NO configuration opens the circuit when the magnet is removed, triggering the connected alarm or monitoring system
• 1/2-inch recessed form factor allows flush mounting in drilled door frames or panel edges
• Matched switch set sold as a single unit pair for consistent magnetic gap performance
• Recessed design reduces visibility and limits tampering exposure
• Suitable for low-voltage security and access-control wiring applications

Compatibility

Designed as an OEM-style replacement or new-installation recessed contact for standard low-voltage door and window monitoring circuits requiring a SPST-NO configuration.

Installation Notes

Installation is typically performed by a licensed electrician or certified low-voltage security technician. De-energize the alarm or access-control panel before making wiring connections. The recessed body is press-fit or epoxy-set into a drilled hole sized to match the contact diameter; verify hole depth and diameter before installation to ensure proper magnetic gap alignment. Follow local building codes and NEC low-voltage wiring requirements for conductor type and routing.