Protect your home or business with Ajax’s intelligent door contact sensors and motion detectors, available now at WME.
Why Door & Window Sensors Matter
When it comes to home or commercial security, entry points are the most vulnerable. A strong CCTV system may capture what happens, but only door and window sensors can detect an intrusion as it happens.
That’s where Ajax door and window sensors stand out — combining sleek design, smart technology, and reliable protection for your property.
Whether you’re upgrading your Ajax alarm system, installing a new setup, or enhancing your existing smart security network, WME has the latest Ajax devices ready for next-day UK delivery.
What Is a Door Contact Sensor?
A door contact sensor (also known as a magnetic contact or sensor door alarm) detects when a door or window is opened. It uses two components:
- A magnet that attaches to the door or window.
- A sensor that attaches to the frame.
When the two parts move apart -for example, when someone opens the door - the sensor sends a signal (often called a door signal) to your alarm hub, triggering an alert or siren.
These small but powerful devices are the first line of defence in any smart alarm system.
Ajax Door and Window Sensors: Key Features
Ajax has become one of the UK’s best-rated smart security brands — known for reliability, simplicity, and modern design. Their DoorProtect and DoorProtect Plus sensors integrate seamlessly into the Ajax alarm ecosystem.
| Model | Type | Features | Best For |
|---|---|---|---|
| Ajax DoorProtect | Magnetic Door Contact Sensor | Detects opening/closing, tamper protection, wireless, 7-year battery life | Homes, offices |
| Ajax DoorProtect Plus | Advanced Sensor | Includes vibration & tilt detection, tamper protection, instant alerts | Shops, garages, business entrances |
| Ajax MotionProtect | PIR Motion Detector | Detects movement, pet-immune, integrates with Ajax Hub | Internal use |
| Ajax GlassProtect | Glass Break Sensor | Detects window breaking via frequency analysis | Conservatories, glass frontages |
Shop the full Smart Motion & Door Sensor Collection at WME.
How Ajax Sensors Work
Ajax sensors communicate wirelessly using the Jeweller radio protocol, offering up to 1,200 metres of range (line of sight). This means:
- No messy cabling or drilling – easy DIY or professional install.
- Instant door signal transmission – alerts reach your phone in seconds.
- Low power use – batteries can last up to 7 years.
- Smartphone control – manage everything through the Ajax app (iOS/Android).
When a door or window opens unexpectedly, the Ajax app notifies you instantly. You can view real-time system status, arm/disarm zones remotely, or check logs from anywhere.
Tip: Pair your DoorProtect with the Ajax Hub 2 Plus for smart automation and enhanced remote management.
Why Choose Ajax Door Contact Sensors Over Others?
While there are plenty of sensor door systems on the market — from Yale and Pyronix to Texecom — Ajax has carved a reputation for simplicity, style, and advanced encryption.
Here’s how Ajax compares:
| Feature | Ajax | Yale | Pyronix |
|---|---|---|---|
| Wireless Range | Up to 1,200 m | 200–300 m | 300 m |
| Battery Life | Up to 7 years | 2 years | 3 years |
| Mobile App Integration | Yes (Ajax App) | Limited | Yes |
| Smart Automation | Yes | Basic | Limited |
| Design | Sleek, modern | Bulky | Functional |
| Tamper Protection | Yes | Yes | Yes |
Verdict: If you want premium reliability with professional-grade performance, Ajax leads the pack.
Other Smart Sensor Options at WME
At WME, we stock more than just Ajax. You’ll also find:
- Pyronix Door Contacts – robust, installer-friendly options for larger commercial setups.
- Hikvision Magnetic Contacts – great integration with Hikvision CCTV for full site security.
Explore them all in our CCTV & Security and Access Control Systems categories.
How to Install an Ajax Door Sensor
Installation is simple — no wiring required.
- Choose your mounting location: Ideally near the top corner of the door or window.
- Attach using screws or adhesive tape.
- Add the sensor to your Ajax app: Open the app → Devices → Add Device → Scan QR code.
- Test signal strength using the built-in test mode.
- Arm your system and test the door signal.
Need more help? Read our How to Install an Ajax Alarm guide for setup tips.
Combine with Other Smart Security Devices
Pair your Ajax door sensors with:
- Ajax Motion Detectors for full room coverage
- Smart Sirens for instant alerts
- CCTV Systems to record and verify intrusions
This creates a layered security setup that works automatically — all controlled through one app.
For Installers and Trade
If you’re an electrician, alarm installer, or trade professional, WME’s Trade Portal offers:
- Exclusive trade pricing on Ajax products
- Priority stock availability
- Dedicated technical support
👉 Join the WME Trade Programme today to access your benefits.
FAQs
Q: What’s the difference between Ajax DoorProtect and DoorProtect Plus?
DoorProtect detects door opening; DoorProtect Plus also detects vibration and tilt, useful for windows or garage doors.
Q: Can Ajax sensors work without Wi-Fi?
Yes – they communicate over radio via the Ajax Hub, not Wi-Fi.
Q: How far can Ajax sensors transmit signals?
Up to 1,200 metres (line of sight), even through walls.
Q: Can I use these sensors with other alarm brands?
They’re designed to work best within the Ajax ecosystem for reliability and smart integration.
Ajax’s door and window sensors are the definition of smart protection — discreet, long-lasting, and lightning-fast. Whether for home or business use, these door contact sensors deliver the security and convenience modern users expect.
Explore the full range of Ajax Door Sensors and Smart Motion Devices or browse all Ajax Security Systems available at WME today.