The FSH-FSS1-S is part of the FSS1 series of High Security Door Monitoring Sensors that are designed to provide a true high security solution for door position monitoring. It is an award-winning monitoring solution that can replace traditional magnetic balanced reed sensors and comes in surface or flush mount models.

Specifically developed for high security applications in government, high risk and defence installations, the FSS1 Series high security door monitoring sensors consist of seven magnetic sensors that are used to detect a unique magnetic footprint from an array of magnets on the partnered face plate. One sensor is used to detect the position of the magnetic face plate in relation to the device, while the other six sensors are used to determine the polarity, size, strength, and position of the magnets on the unique magnetic face plate in relation to the memorised pattern.