Ajax DoorProtect: Ajax Wireless Door Opening Sensor

DoorProtect Jeweller is a wireless door opening detection sensor designed to protect doors, windows, and skylights by detecting intrusion or attempted break-ins. The device uses a reed switch manufactured in the UK, with a durability of over 2 million open/close cycles.
The sensor comes with two sizes of magnets for easy installation, even in narrow door frames. The device uses a built-in battery that can operate for up to 7 years without needing replacement.

High-quality magnetic switches for precise detection.
The core component of DoorProtect Jeweller is the reed switch—a small glass tube containing a group of contacts.
Encased in a durable, hard plastic housing, reed switches ensure stable operation for decades and are unaffected by impacts or transportation.

• High detection efficiency when the magnet is installed on the correct side.
• It has a sturdy protective casing for the reed switch.

Enhance security with additional sensors.
DoorProtect Jeweller features an external wired sensor connection port of the NC (normally closed) type, which enhances the reliability of the entire system.
Additional devices can be integrated (These devices can provide independent or simultaneous alerts with DoorProtect.)

• Other door opening sensors
• Vibration sensor
• Motion sensor

Don't miss anyone who visits.
The Chime feature transforms the Ajax door opening sensor into a smart doorbell combined with the Ajax siren. When the system is in unprotected mode, the siren will sound when the door opens — with 4 different short sound patterns. Users can:

Adjust the volume

Assigning different alarm sounds to each door helps identify which door has just been opened.

Wireless – Superior Performance
DoorProtect Jeweller uses pre-installed CR123A batteries — no wires needed, easy to install.
Each battery is tested directly at the factory in real time, and the device undergoes rigorous testing to ensure quality.

Operating time up to 7 years

Early low battery notifications via the Ajax app allow users and monitoring companies to proactively replace the battery.

Proprietary wireless technology
Ajax's proprietary Jeweller radio protocol ensures a secure, two-way connection between the sensor and the control center.

• Connection range up to 1,200 m (in open environment)
• Encrypt data and authenticate devices during each connection session.
• Anti-jamming, anti-spoofing, and anti-data theft.
• Automatically adjusts transmission power to save energy.

Wide range of operations
In areas with weak radio signals, the ReX Jeweller range extender helps boost connectivity for all Ajax devices.
ReX 2 Jeweller allows signal transmission over Ethernet connection, ensuring stability in buildings with a lot of steel or concrete.

• Supports up to 5 Wi-Fi extenders in a system.
• Double the system expansion: suitable for multi-story buildings, parking garages, or basements.

Intelligent system monitoring
All Ajax devices have a self-diagnostic function and send status reports to the control center.
Ajax Cloud will process information and send instant alerts to users, security companies, or technical engineers if errors are detected.

• Automatic device diagnosis with status reporting.
• Check the sensor's condition regularly.
• Timely maintenance alerts

Easy installation
DoorProtect Jeweller works right out of the box — no disassembly required.
Installing it into the SmartBracket only takes a few minutes. Simply scan the QR code using the Ajax app to connect the device to the system.
All settings can be adjusted remotely, eliminating the need for an engineer to visit the site.