Skip to main content

Intruder Detection

Alarm systems provide the first line of defence for any site, providing both a deterrent and an early warning system. Well-designed systems will result in intruders moving on before even attempting to break in. However, for persistent criminals, alarms will be activated immediately a fenceline or building is breached and a response made before any damage is done, minimising any losses.

Intruder Detection Guide

Please download our guide to find out more about what Intruder Detection systems can do for you and how we can help.
Intruder detection guide

Tailored Intruder Security Systems For Your Sites

Intruder systems can be complicated and may need many layers of interconnecting protection to provide the level of security required. G4S has many years experience in specifying, installing and supporting intruder systems to a diverse range of markets and critical infrastructure. Whatever your system needs, G4S can help.


  • Work only with the leading intruder system manufacturers
  • Systems designed using the latest technology
  • Expert and experienced design team, with many years of experience designing and supporting intruder systems for Enterprise and Critical Infrastructure organisations
  • Can be integrated with a larger security system to leverage the benefits of all system elements


Please request a call back for more information or download our Intruder Detection Design Guide to find out more.


Ready to speak to a G4S security expert?

W2L G4S Website:
Business Unit Entity Code:
Thank You

Your question has been prepared and a G4S sales representative will get in touch with you!

Perimeter Detection

Perimeter Detection

Fenceline Hardening

Fenceline Hardening

Remote Security Services

Remote Security Services

Mobile Response

Monitor room with CCTV displaying on the wall and various seats with monitors on the desks