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Product Code: FSS1S

The FSS1 Series of High Security Door Monitoring Sensor are designed to provide a true high security solution for door position monitoring.

It is a state-of-the-art monitoring solution with a surface mount version as a superior replacement for traditional magnetic balanced reed sensors.

Specifically developed for high security applications in government, correctional and military installations, the FSS1 Series High Security Door Monitoring Sensor consist of seven magnetic sensors that are used to detect a unique magnetic footprint from an array of magnets on the magnetic 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. The FSS1 is equipped with sophisticated anti-tamper facilities.

The product is listed in the Security Equipment Evaluated Product List (SEEPL) and UL 634.2.

  • Surface mount version.
  • Voltage 10-30Vdc / <10mA - Can now be powered by Type 1/1A and Class 5 E.O.L Modules.
  • Alarm contacts circuit board x 1 for alarm, flying lead x 1 for access control etc., both N.O. & common, 0.25A @ 30V.
  • Tamper contact N.C. & common, 0.2A @ 30V.
  • Door gap 1.5-7 mm vertical door gap, and up to 15 mm door movement for alarm to trigger.
  • End of line compatibility space for type 1 & 2 modules.
  • IP67 rated.
  • RMC compliant.
  • SCEC approved to security level 4 (SL4) and U.L. 634 Level 2.
  • Up to 8 magnets for unique magnetic footprint.
  • Hall effect sensors 7.
  • Conduit entry 20 mm (½” BSP pipe thread).
  • Dimensions 75 (L) x 34 (H) x 35 mm (D).


Brand FSH
IP Rating IP67
SCEC Endorsed Yes, SL4
Working Voltage 10-30V DC