Ajax perimeter and external detection
Perimeter protection that detects movement before the building is entered
External protection is a separate security layer for driveways, side access, yards, boundaries, windows, doors and outbuildings. NOX designs it around the approach routes and environment rather than copying the internal alarm system outside.
Designed around the property
Outdoor detection needs precise design and testing
Sunlight, vegetation, animals, traffic, gates, paths, installation height and the direction of travel can all influence performance. The survey identifies where an early warning layer adds value and which device pattern suits each approach.
- ✓ Curtain Outdoor narrow-beam detection
- ✓ MotionCam Outdoor photo verification
- ✓ High-mount outdoor detection options
- ✓ Driveway and side-access coverage
- ✓ External sirens and app alerts
- ✓ Protection for yards and outbuildings
- ✓ Integration with Ajax intruder alarms
- ✓ Ongoing maintenance and adjustment
Products and system options
An earlier warning layer around the property
Ajax external detection can protect approaches, windows, doors, yards and outbuildings before an intruder reaches the internal alarm zones. Device selection and positioning are confirmed through a dedicated perimeter survey.
Curtain Outdoor
Narrow curtain-style outdoor detection for windows, doorways, passages and selected boundary lines.
DualCurtain Outdoor
Two opposing detection curtains can cover longer boundary runs or approaches from a central mounting point where suitable.
MotionCam Outdoor
Outdoor motion detection with camera-assisted verification options, anti-masking features and adjustable detection on suitable Ajax systems.
StreetSiren
External audible and visual indication can reinforce the perimeter layer and wider intruder alarm system.
Outbuilding protection
Garages, workshops, stores and detached buildings can be brought into the wider Ajax system subject to survey and communication range.
Maintenance and adjustment
Outdoor systems need cleaning, signal checks, battery review, firmware updates and retesting as the environment changes.
Product videos
See the technology in action
Explore the Ajax platform and individual products in motion. Final device selection still follows the property survey and the way the site will be used.
Ajax outdoor protection
See how external detection can create an earlier warning layer around a property.
How NOX delivers the project
From survey to handover and ongoing support
Perimeter survey
We walk the external approaches, identify likely routes and consider environmental movement or obstructions.
Device and detection pattern
Curtain, wide-area, camera-assisted or high-mount detection is chosen around the exact approach.
Installation and testing
Mounting height, angle, range, signal and detection zones are tested and adjusted on site.
Handover and maintenance
Users are shown external zones, notifications and operating modes, with periodic cleaning and testing available.
More detail
Installation, operation and long-term support
Curtain Outdoor
A narrow curtain-style detection pattern can protect windows, doors, passages and boundary lines without treating the whole outside area as one zone.
MotionCam Outdoor
Wide-area outdoor detection with photo verification options can provide visual context following a detected event on suitable systems.
High-mount detection
Selected high-mount devices can protect wider commercial or residential approaches where the correct mounting position and field of view are available.
Separate from the internal alarm
The external layer can be armed, zoned and managed around how the property is used rather than simply mirroring internal movement detectors.
Servicing, maintenance and aftercare
Keep the system healthy after installation
NOX supports new installations and suitable traditional or existing systems with health checks, testing, cleaning, battery or recorder review, firmware where supported and clear service records.
Relevant NOX work
Real installation examples
Confirmed project locations and system scopes, with no invented outcomes or customer claims.
Industrial perimeter protection · Dronfield, Derbyshire
External Ajax detection at a Dronfield industrial site
The Dronfield site needed protection around its external approaches rather than relying only on detection inside the building. NOX designed a perimeter layer using five outdoor Ajax detectors and external sirens around the key routes into the premises.
Installed by NOXFive Ajax outdoor detectors · External sirens · Industrial perimeter protection · Dronfield installation
Read the project story →Customer reviews
Trusted for clear advice, tidy work and proper handover
“We had NOX Fire & Security install our commercial fire alarm system alongside an intruder alarm, and the whole experience was spot on from start to finish. Clean, professional installation, everything clearly explained, and the system is easy to manage through the app with instant alerts. The fire system is clear, reliable and easy for the team to manage without overcomplicating things. No pushy sales, no unnecessary contracts — just honest advice and proper workmanship. You can tell they care about doing things right. Highly recommend NOX for any business looking for fire or security systems in Chesterfield / Sheffield.”Rory StirlandCommercial Fire Alarm & Intruder Alarm
“Brilliant service from NOX. Super professional, knowledgeable, and they went out of their way to be helpful. Everything was explained clearly and in detail. The install was tidy, and the whole process was smooth from start to finish. We were thinking about getting a security system for a while and now we're so glad we went with NOX. Would 100% recommend to anyone.”Ryan HargreavesAjax Alarm System
“We recently had NOX install cameras, smoke screens, and alarms at our office and the whole experience has been spot on from start to finish. From the very first phone call with Isaac, everything felt straightforward and reassuring. He took the time to explain our options, answered all our questions, and helped design a system that made sense for our building and our budget. No pushy sales tactics at all, which was refreshing. The installation was smooth, the team were professional, and even after everything was fitted, Isaac has been on hand to help with any follow-up questions. A really great service and a company I'd happily recommend.”Nathan De La RosaCommercial CCTV, Alarms & Smoke Screens
Common questions
Clear answers before you commit
Is perimeter protection the same as an intruder alarm?
It connects to the wider security system, but it is designed as a separate external layer with its own devices, detection patterns and environmental considerations.
Can it protect a driveway or side path?
Yes, subject to survey. Curtain or wider-area detectors can be selected around the route, mounting positions and surrounding movement.
Can outdoor detectors take photos?
Selected Ajax MotionCam Outdoor and CurtainCam models can support photo verification features when paired with compatible equipment and correctly configured permissions.
Does external detection need maintenance?
Yes. Outdoor devices benefit from periodic testing, cleaning, battery checks, firmware review and adjustment if the environment changes.
Next step
Request your free security survey
Tell us about the property and what you need. The NOX team will review the details, contact you directly and arrange the right survey or quotation route.