The F102 Heavy Duty Rolling Shutter / Garage Door Contact with 2m of Armoured Sleeving from Knight Fire & Security is a potted single reed contact alarm ideal for placement in rolling shutter doors in moderate-risk domestic or commercial areas. When wired to an alarm system, these contacts will trigger the sounder if the gap opening exceeds 50mm, and as the contact creates a circuit to your security system, wire tampering or a forced break of the circuit elsewhere will also sound the alarm. What is meant by the tearm Grade 2? Grade 2 refers to the grade of intruder alarm system you have on the premises, especially if you are depending on the alarm system for insurance cover in your home or business. A Grade 2 Alarm basically means Low to Medium Risk, Intruders are expected to have a little more knowledge of the alarm system and use a general range of tools and some specialist equipment. This contact features a durable weatherproof metal body for commercial uses, and 2M of armoured sleeving to pretect the conecting cable to your system. Note: ensure that arrow on magnet lines up with dot on contact on housing for maximum operating gap and lateral tolerance Main Features: Single Reed Rolling Shutter Contact Grade 2 Alarm Trigger 50mm Operating Threshold IP67 Aluminum Construction Technical Specification: Operating Gap: 50mm (Approx) Materials: Aluminium / 2M armoured sleeving Magnet: Ferrite or Alnico V Contact Material: Rhodium Voltage Range: 1 – 100v DC, 125v AC Max Switching Current: 500mA Max DC, 500mA Max AC Temperature Range: -40°C - +50°C Technical Drawing Installation of this product may require Alarm Cable