GRI MMF-875

The GRI MMF-875 is a rare Earth surface-mount magnet that measures 7/8"L x 3/8"W x 1/8"D. It is best-suited for use with a larger surface-mount sensor. The magnet should go on the moving part of the door or window, and the sensor should go on the frame. Test the sensor after installation.

The best aspect of a rare Earth magnet is its impressive magnetic strength. This helps to ensure that the sensor's magnetic reed switch remains in a non-faulted closed position when the door or window is shut. For best results, the GRI MMF-875 should be properly aligned with the sensor. The sensor will typically have a mark or indentation to let you know which side should be facing the magnet. Once you open the door or window, the magnet will separate from the sensor. The sensor's internal reed switch will be released, and the sensor will alert the system.

The GRI MMF-875 measures 7/8" in length, and it is best used with a larger sensor. For an aesthetically pleasing installation, you want to make sure that the sensor is as large or larger than the magnet. You should remember to test the sensor and magnet combination after installing. This way, you can know that the system will respond appropriately when the door or window is opened.