This series offers a standard gap of 1 inch, a wide gap of up to 1 1/2 inches and an extra wide gap of 2 inches and can be installed on a steel surface with a minimum gap penalty.

The “P” style is a pre-wired switch with 2 feet of conductor cable. A broad range of mounting brackets are also available.

The GRI Closure Sensors can be installed on most doors, windows, cabinets, security/control boxes, and more.

Terminal Location: Side
Circuit Types: N/O or N/C
Gap Distance: 1″ (5/8″ on steel)
Automatic Reset

Magnetic contact sensors with ControlByWeb® products

Connected to a ControlByWeb product’s digital input, once the magnetic switch is in proximity of the magnet, it will open or close its contacts (depending on configuration), turning the digital input on/off. The ControlByWeb product can send an email/text and/or trigger a relay in a local or remote location.

Contact-Closure Sensor Wiring Diagrams

Both the 29C and 28C have 3 terminals which allow to choose between a normally-open (NO) or normally-closed (NC) configuration.

The MPS subminiature sensor has a pre-attached wire, and is configured as a fixed normally-open (NO) configuration.