Intruder detection with a response that works.
Alarm systems with clear detection zones and a sensible, workable response — protecting your buildings, stock and restricted areas when the site is closed.
Request a site survey →An alarm is only as good as what happens next.
Detection is the easy part. SBM designs the response — so an alarm leads to action, not confusion.
A good intruder system gives you a clear picture: which zone, which moment, how serious. We position detection to flag genuine events and ignore the passing shadows, zone the site so an alert tells you exactly where to look, and set out a response that’s practical to actually follow.
The aim is simple — when the site is empty, you know it’s covered, and you know what to do if something happens.
Detection designed to be acted on.
Clear detection zones
Sensible zoning, so an alert tells you exactly where to look — not just that something happened.
Fewer false alarms
Detection chosen and positioned to flag real events — not passing shadows or pets.
A workable response
A clear process that turns an alarm into a practical course of action, every time.
Monitoring options
From local alerts to monitored response — matched to the site and the level of risk.
From first survey to long-term support.
Survey
We visit, learn how the site closes down, and identify where detection is needed.
Design
A zoned system engineered to flag real events and support a clear response.
Install
Clean, considered installation that’s tidy on site and built to last.
Support
Long-term support that keeps the system reliable, current and easy to use.
Protecting sites when no one’s there.
Out of hours is when premises are most exposed. SBM designs intruder systems that hold the line — with two decades of experience protecting the UK’s most demanding sites.
Know your site is covered after hours.
Tell SBM what you need to protect. We’ll arrange a survey-led design and a clear, practical proposal — no jargon, no off-the-shelf packages.
Request a site survey →Common questions
Intruder alarm questions, answered.
What grade of alarm system do I need?
It depends on the risk and what you’re protecting, and your insurer may specify a grade. We assess the site, explain the options in plain terms, and design detection that matches the genuine risk rather than over- or under-specifying.
Can the alarm be monitored, and what happens when it triggers?
Yes. Alarms can be locally sounding or remotely monitored, with a response process agreed up front — keyholder alerts and, where appropriate, monitored response. We design the whole chain so an activation leads to a sensible, workable response, not just noise.
Will it work alongside our CCTV and access control?
Yes. An alarm is far more useful as part of one joined-up system — we routinely link it with CCTV and access control so an activation can be verified and acted on quickly.
How do you avoid false alarms?
Careful design. We zone detection sensibly, choose the right sensors for each area, and account for how the site is actually used — so the system flags genuine events, not the cleaner or a draught.
Do you maintain and service the system?
Yes. We provide long-term support that keeps the system reliable and current, so it still does its job well beyond the day it’s installed.