MC 346 is a universal magnetic contact with a switchable contact function (NC/NO). For use in SSWiN and in access control systems to signal unauthorized opening of secured gates, windows and doors. Both sensor elements, the reed switch and the magnet, are placed in waterproof plastic, cylindrical housings. This allows for quick installation of the sensor, directly in a wooden base. A wide variety of accessories allows the sensor to be used in almost any recess or on a surface.