If you have spent any time researching home security, you will have noticed that most systems ask you to make a choice: go with something simple and affordable that covers the basics, or invest in a professional-grade setup that requires an installer and a monitoring contract. Ajax has been quietly building a third option — a fully integrated, wireless ecosystem that delivers professional-level protection with consumer-level manageability — and after going deep on the product range, it is one of the more technically serious systems available to homeowners today.
Here is a full breakdown of how the system works, what it covers, and which products handle each layer of home protection.
The Brain: Hub 2 Plus
Every Ajax system starts with the Hub — the central control panel that connects all devices, manages alerts, and communicates with the outside world. The Hub 2 Plus is the flagship option for residential use, and its architecture deserves attention before anything else.
The hub supports up to 100 connected devices across up to 9 security groups, with 5 ReX signal repeaters and 25 video cameras in the system. More importantly, it maintains simultaneous connections across Ethernet, Wi-Fi, and two separate cellular channels — meaning a broadband outage, or even a deliberate signal disruption, does not take the system offline. Ajax Hub 2 switches signalling to other frequencies if signal jamming is detected, and is wholly protected from viruses at the software level.
The hub works up to 15 hours from its built-in backup battery, and includes geofence technology that reminds users to arm the alarm when leaving and disarm it on return. Everything is managed through the Ajax app — arm, disarm, check status, view alerts — from anywhere.
Outdoor Protection: The Perimeter Layer
The first line of defence for any home is its perimeter: the doors, windows, garden, and driveway that separate the property from the street.
For outdoor motion detection, the MotionCam Outdoor is the standout device. It detects motion using dual IR sensors and takes 1 to 5 photos at a time, transmitting them to the hub. The communication range without obstacles reaches up to 1,700 metres. The hood protects the camera from rain and snow, and infrared backlight enables clear night photos — so you get visual confirmation of what triggered the detector, not just a notification.
For entry points, DoorProtect and DoorProtect Plus handle doors and windows with magnetic contacts, detecting both opening and vibration. These are the sensors most likely to catch an attempt before it becomes a breach.
The StreetSiren outdoor siren completes the exterior layer — a loud, visible deterrent that activates immediately when a sensor triggers, drawing attention before an intruder has time to get inside.
Indoor Protection: Motion, Photo Verification, and Access
Inside the home, the MotionCam (PhOD) is the device that most clearly illustrates Ajax’s engineering philosophy. It detects motion at up to 12 metres, ignores pets when installed correctly, and after detecting motion takes a series of photos which are transmitted to the hub and delivered to the app within seconds.
The detector can automatically take photos by schedule, when another detector in the system is triggered, and when someone arms or disarms the system. It uses an advanced optical system with a CMOS sensor and HDR technology to produce clear, balanced images even in difficult lighting.
The practical effect of photo verification is significant: instead of a notification saying “motion detected in living room” and no way to know if it is an intruder or a curtain moving in a draught, you get a visual confirmation within seconds. The alarm notification itself is transmitted in 0.15 seconds.
For access control, the KeyPad TouchScreen and Tag keyfob allow disarming via PIN, NFC tag, or smartphone — with the system logging every arming and disarming event automatically.
Fire and Environmental Protection
Ajax hubs can manage fire and leak detectors alongside intrusion devices — all in the same system and the same app.
The FireProtect 2 (Heat/Smoke/CO) detects smoke, heat, and carbon monoxide simultaneously, triggering the same instant alert pipeline as any intrusion sensor. The LeakProtect sensor lies flat on the floor near water sources and triggers immediately on contact with moisture — catching a leak under a kitchen unit or near a washing machine before it becomes a flooded room. What makes this genuinely useful is the integration: a fire alert and a water alert arrive with the same urgency and the same immediacy as a break-in alert. There is no separate app, no delayed notification, no different response pathway. Everything flows through the same Hub and the same interface.
Video Surveillance
Ajax’s camera lineup integrates natively with the Hub rather than operating as a separate system. The DomeCam Mini and BulletCam cover indoor and outdoor surveillance respectively, with the footage accessible directly in the Ajax app alongside all other system events.
The key advantage over bolted-on CCTV is context: when a MotionCam detector triggers in the garden and a camera covers the same zone, you can switch from the detector’s verification photos to a live camera feed within the same interface. The system is coherent rather than fragmented.
The Verdict
What Ajax Security System has built is a genuinely integrated security platform — not a collection of devices that happen to share an app, but a hardware and software stack designed from the ground up as a whole. The Jeweller radio protocol, the anti-jamming design, the multi-channel communication redundancy, and the photo verification capability are the kinds of engineering decisions that matter in real-world conditions rather than in spec sheets.
For a homeowner who wants professional-grade protection without a professional installation contract, and the ability to manage everything remotely without switching between apps or second-guessing compatibility, it is one of the most complete options currently on the market.
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