GRI

GRI Magnetic Reed Switches & Door Contacts

GRI (George Risk Industries) makes magnetic reed switch door and window contacts for security systems, along with the resistors, spacers, pre-wire plugs, and sensors that go with them. Browse the full GRI catalog, or shop GRI contacts and sensors by type below.

Recessed & Surface Mount Magnetic Contacts

For steel doors, the GRI 180 series 3/4" recessed switch set with 12" leads, like the 180-12-W and 18512W, sits alongside 1" steel door sets such as the 199-12-G. For wood doors and windows, 3/8" press fit sets like the 2020-12-W and 3030-T-W and the rare earth MIGHTY MAG N20RS series fit recessed installs. Surface mount choices include the 55F series, installed with self-adhesive 3M tape and a breakaway flange, the 110 and 100 miniature surface mount sets, and the 29 and 28 series surface switches with the S-28-W mounting spacer. Shop recessed contacts, surface mount contacts, or switch sets by magnet group.

Overhead Door, Industrial & High Security Contacts

Commercial openings use GRI overhead door switch sets such as the 4532L miniature overhead door set, commercial and industrial switch sets like the 4402-A wide gap industrial surface mount set and the 4700-A track mount switch, high security switch sets, and pull apart switch sets with armored cable and connectors.

End of Line Resistors, Pre-Wire Plugs & Tamper Switches

The GRI 6644 is a pack of 2 1k, 1/8 watt carbon film resistors with 12-inch leads, and more contact and resistor packs are in EOL resistors. Installation parts include PW75W and PW-500-W self-locking pre-wire plugs, and roller ball, plunger, and tamper switches such as the DS-01-B short roller ball and TS-01 box tamper switch.

Water Sensors, Pool Alarms & Environmental Monitoring

GRI water and liquid detection sensors such as the 2605 and 2624 detect water damage caused by leaking pipes or corroded water heaters. Pool alarms like the DPARM instant-on pool alarm and the 289 series door alerts guard pool and spa doors, and temperature and humidity sensors, current controllers and shunt switches, and special purpose sensors round out the line.

GRI Spec Help

Need a GRI contact for a specific door, gap, or loop type? Contact our team with the door material, gap, and panel loop type and we can help you pick the right GRI switch set.

Live Chat