The M11/B6, B8, B10, B12 series sensor magnet in housing is sealed in a convenient, easy adjustable threaded brass housing. Pair this magnet with our MK11/B (M6, M8, M10 or M12) series reed sensor (sold separate) for a proximity sensing solution. The brass housing is structurally robust enabling it to withstand higher torque settings, and resist high temperatures, moisture, and compression. The sensor should be mounted on a fixed surface with the actuating sensor magnet on the moving surface.