George Risk Industries Inc. PB-2020-B Recessed Plunger Contact

Product Description

The GEORGE RISK INDUSTRIES INC. PB-2020-B is a recessed plunger-style magnetic contact designed for closed-loop security and detection circuits. The unit features a 3/8-inch recessed form factor, allowing it to be mounted flush within a door frame, window frame, or similar surface. When the door or window opens, the plunger releases and breaks the closed circuit, triggering the connected alarm or control panel. Installation is typically performed by security technicians or electricians working on low-voltage detection systems.

The PB-2020-B is suited for residential and light commercial access-point monitoring where a discrete, recessed installation is required. The closed-loop wiring configuration integrates with standard hardwired security panels and alarm control systems. Its compact 3/8-inch body fits into tight frame cavities where surface-mount contacts are not practical, making it a common choice for new construction and retrofit door or window sensor installations.

Key Features

• Recessed plunger design for flush, low-profile installation in door and window frames
• Closed-loop circuit configuration compatible with standard hardwired alarm panels
• 3/8-inch body diameter fits tight frame cavities
• Sold individually as a single unit

Compatibility

Designed as an OEM-style recessed plunger contact for use in hardwired closed-loop security and detection circuits typical of residential and light commercial alarm systems.

Installation Notes

Installation should be performed by a qualified low-voltage technician or licensed electrician in accordance with applicable NEC low-voltage wiring guidelines. Power down or disable the alarm panel before wiring the contact into the detection loop. Drill the mounting hole to the appropriate diameter to accept the 3/8-inch recessed body, and ensure the plunger actuates fully when the door or window closes. Verify circuit continuity with a multimeter before restoring panel power.