GRI 20RS-T

The GRI 20RS-T is a recessed 3/8" press-to-fit magnetic contact switch designed to provide reliable perimeter protection for doors and windows while maintaining a clean, concealed appearance. The sensor can be used with a maximum gap of 1/2". Because the switch installs directly into the frame, it remains hidden from view, making it ideal for installations where aesthetics and tamper resistance are important. This type of recessed contact is commonly used in residential and commercial alarm system installations.

This switch operates as part of a hardwired security zone and works by detecting the presence of its corresponding magnet. When the door or window is closed, the magnet aligns with the internal reed switch and maintains the circuit state. When the opening is moved, the magnet separates from the switch, causing a change in circuit condition that signals the alarm panel. This allows the system to detect unauthorized entry attempts at protected openings.

The 20RS-T is designed with a short body length of approximately 0.93", making it ideal for applications where installation depth is limited. Its press-to-fit design allows for quick installation without the need for mounting screws, helping reduce labor time while ensuring a secure fit. The recessed configuration also helps protect the device from physical damage and environmental exposure compared to surface-mounted contacts.

This contact is compatible with a wide range of hardwired alarm control panels and is commonly used to protect doors, windows, and other movable openings. It can be installed in wood, vinyl, or similar frame materials and is often used in new construction as well as retrofit installations. Its concealed design makes it especially useful in finished spaces where maintaining a clean look is important.

The GRI 20RS-T provides dependable intrusion detection in a compact form factor, making it a practical choice for professional security installations requiring reliable hardwired perimeter protection. It along with other wired recessed door and window sensors provide options for most installations.

Specifications

• Manufacturer: George Risk Industries (GRI)
• Model: 20RS-T
• Device Type: Recessed magnetic contact switch
• Installation: Press-to-fit recessed mounting
• Diameter: 3/8"
• Length: Approximately 0.93"
• Operation: Reed switch with magnet
• Loop Type: Closed loop
• Connection Type: Hardwired terminals
• Typical Use: Door and window protection
• Compatibility: Hardwired alarm systems