Magnetic contact detectors belong to the essential devices of perimeter
protection. They are used to protect doors, windows, etc., by triggering alarm
when they are open. The S-3 detector is designed for flush-mounting, i.e. its
elements are to be put in place by screwing their aluminum enclosures into
properly prepared holes in wooden or plastic door frame, window frame, etc. S-3
consists of two watertight parts: the reed switch (magnetic) sensor and the
magnet, whose faces should contact each other. Moving one part away from the
other breaks the sensor circuit, which is indicated as a violation.
Additionally, the detector is provided with a tamper loop.
S-3 is designed to work with any alarm control panel having NC inputs as
well as to be used in automation system as a control element. It meets the
requirements of EN 50131-1 and EN 50131-2-6 standards
for Grade 2.