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.
System in detail
Equipment and installations matched to the requirement
A selection of the real equipment, installed positions and customer-facing features used across suitable NOX projects.
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.
Earlier warning
Connect the perimeter to the wider response
Pair outdoor detection with CCTV, the intruder alarm, professional monitoring and ongoing support so activity around the approach leads into a defined response.
01CCTV Verification
Add recorded views around the protected approach.
Explore service02Intruder AlarmsConnect external warning with internal detection and user control.
Explore service03Alarm MonitoringAdd professional signal handling where the system is suitable.
Explore service04Ongoing SupportCoordinate monitoring, servicing and selected maintenance.
Explore serviceContinued support
Installed by NOX. Supported by NOX.
Installation is the start of the system lifecycle. Monitoring, maintenance, fault support and future changes can remain connected to the original design.
Monitoring
Professional oversight and agreed escalation when the property is unattended.
Maintenance
Planned inspections, testing, cleaning and system-health checks.
Priority Support
A straightforward contact route for faults, changes and future upgrades.
One Provider
Fire, CCTV, intruder and emergency-lighting support coordinated through one local point of contact.
Related services
Complete the system
Choose the next service that strengthens the same system, site or maintenance plan.
CCTV
Verify activity around the protected approach with recorded views.
View serviceIntruder Alarms
Connect outdoor warning with internal detection and controlled arming areas.
View serviceAlarm Monitoring
Add professional signal handling where the system is suitable.
View serviceOngoing Support
Keep perimeter devices, communication and wider alarm health checked over time.
View serviceRelevant NOX work
Real installation examples
Genuine NOX projects showing the property type, equipment and work delivered.
Residential CCTV & Intruder · Chesterfield, Derbyshire
Ajax Alarm and CCTV Installation for a Chesterfield Home
This Chesterfield property was being renovated and needed a security system planned around both the risk and the finished look of the home. The customer wanted protection across the main house, garage and external approaches, but standard white equipment would have stood out against the darker frames and brickwork. NOX combined Ajax intruder protection with black external CCTV, a matching keypad, recording equipment and a branded warning device, then configured the system around straightforward household use.
Installed by NOXAjax intruder alarm · Black CCTV cameras · Ajax keypad · NOX external warning device
Read the project story →
Industrial perimeter protection · Dronfield, Derbyshire
Perimeter Alarm Protection for an Industrial Site near Dronfield
The Dronfield site contained open approaches, working areas and stored materials that could be reached before an intruder entered the main building. Internal alarm detection alone would therefore have provided warning too late in the sequence. NOX surveyed the genuine routes into the site, selected positions around the yard and covered areas, installed five Ajax outdoor detectors and an external warning siren, then tested the individual perimeter zones around the way the industrial premises operates each day.
Installed by NOXFive Ajax outdoor detectors · External warning siren · Industrial perimeter protection · Dronfield installation
Read the project story →Local services
Related services in your area
Find the most relevant NOX installation, servicing and takeover options across our core service area.
Helpful guides
Plan perimeter protection that detects movement before the building is entered with practical information
Practical answers covering specification, installation, maintenance and existing-system decisions before you request a survey or quotation.
Intruder Alarm GuidesHow much does an Ajax alarm cost?Ajax alarm cost depends on the property, device quantities, external areas, controls, communication and ongoing support—not a single fixed kit price.Intruder Alarm GuidesCan an alarm protect a garage or outbuilding?Often yes, but distance, construction, communication, power and how the building is used must be assessed before equipment is selected.Intruder Alarm GuidesHow often should an intruder alarm be serviced?A planned annual service is a sensible starting point for many intruder alarms, subject to the system, monitoring route, premises and applicable requirements.
Local coverage
Perimeter protection that detects movement before the building is entered across Chesterfield, Sheffield and Derbyshire
Use the most relevant local page for area-specific services, nearby coverage and genuine NOX project experience.
DerbyshireChesterfieldLocal alarm, CCTV and fire safety support from NOX's Chesterfield base, covering homes, businesses, yards and larger multi-system sites.South YorkshireSheffieldResidential and commercial security systems across Sheffield, with particular focus on Dore, Totley, Ecclesall, Fulwood, Ranmoor and the wider South and West Sheffield area.DerbyshireDerbyshireProfessional fire and security installation, maintenance and takeovers across Derbyshire's towns, villages, rural properties and commercial sites.
A useful quotation
What to include with your enquiry
These details help NOX route the enquiry correctly and reduce unnecessary back-and-forth before a survey, service visit or quotation.
Premises and postcode
Include the building use, location, access restrictions and whether the site is occupied while work is planned.
Existing system details
Share panel, recorder or equipment photographs, approximate device quantities, known faults and available records.
Required outcome
Explain what the perimeter protection that detects movement before the building is entered needs to achieve, any insurer or compliance requirement and the preferred project timescale.
Customer reviews
Trusted for clear advice, tidy work and proper handover
“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
“Really impressed with NOX Fire & Security. Isaac, Joe and James made everything super easy from start to finish — no pressure, just honest advice and a system tailored exactly to what I needed. Love how personalised it is, and being able to control my heating, washing machine and lights all from the same security app is a game changer. The lads were friendly, tidy, and took the time to show me how everything worked before they left. Feels good knowing it's all been done properly. Would definitely recommend.”Sasha BrailsfordAjax Smart Security & Automation
“Seamless journey from start to finish! I filled in the simple form and was soon contacted by the team. They were very knowledgeable, professional and really listened to my needs. I have since had a system installed. The price was much less than I had expected and so far the aftercare has been great. I can't recommend them enough!”Jeremy BuntingSecurity System Installation
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
Discuss the right system with NOX
Tell us about the property, existing equipment and what you need the system to achieve. We will confirm the correct survey and quotation next step.