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Ajax DoorProtect U Jeweller (8EU) ASP - Black
Product Code: 121294.03.BL1
DoorProtect U Jeweller
Wireless reed-switch opening detector
Guardian for doors, windows, and valuables
DoorProtect U Jeweller is a version of Ajax�s well-known opening detector, refined to meet the strict UK standards. It delivers reliable protection wherever break-ins may occur � whether it�s doors, windows, or safes holding valuables. Its dual reed switches ensure accurate detection of unauthorized openings, while the anti-chatter technology minimizes false alarms. Two magnets of different sizes allow for adapting the detector installation to various door and window designs.
Key Features
2 reed switches - the magnet can be placed on the left or right side of the detector
Protection against contact chatter to prevent false alarms
More installation options with two magnets included
Chime feature when operating with Ajax sirens
Up to 7 years of operation with the pre-installed battery
Remote control and configuration
Connector for a third-party NC detector
Holding screw to secure the detector on a mounting panel
2 colours of matte enclosure
Informative push notifications
Up to 1,200 m communication range with an Ajax hub or range extender
Jeweller radio communication
Frequency hopping
Hassle-free installation
Discover future-proof hardware
Two reed switches
Two magnets of different sizes
Pre-installed battery
Tamper to notify if a detector is dismantled
Jeweller antenna
Connector for a third-party NC detector
SmartBracket mounting panel
Holding screw for a more reliable fastening
Flexible mounting with two reed switches
DoorProtect U Jeweller uses two reed switches for trouble-free opening detection. This design offers more versatile mounting for different installation needs: the magnet can be positioned on either the left or right side of the detector. The reed switches are housed in durable plastic capsules, which ensures their integrity during transportation or accidental drops. For the optimal setup, installers can choose between a larger or a smaller magnet, both included in the kit.
Durable capsules for secure transportation
Two magnets of different sizes included
Left-side or right-side magnet placement
Enhanced security with additional detectors
DoorProtect U Jeweller features a connector for a third-party device with an NC contact. Installers can use it to add an existing or a new wired opening, motion, or vibration detector to an Ajax system. This integration streamlines monitoring over the both detectors within a single Ajax app interface.
Opening detector
Motion detector
Vibration detector
More than just a detector
If the system has sirens, DoorProtect U Jeweller can double as a shopkeeper�s bell. Once the door is opened, the siren signals it with one of four available sound patterns. Different signals can be assigned to separate entrances, ensuring that people on-site always know when someone enters through the main door or a back entrance. Configuring these settings takes just a few clicks in the Ajax app.
Sound signals for doors being opened
Signal customization for different security groups
Customizable signals for each entrance
Wire-free flexibility and reliable performance
DoorProtect U Jeweller operates wirelessly, providing maximum flexibility during installation. The pre-installed battery from trusted manufacturers ensures a hassle-free setup, requiring no extra steps for the device to begin operation. Each battery is thoroughly tested during production, and Ajax Systems inspects every unit to guarantee reliable performance. The battery can be easily replaced after approximately seven years of autonomous operation. Its status is always visible in Ajax apps. Users and security companies receive low battery notifications months in advance, so the replacement is always well-timed.
Real-time testing during battery production
Up to 7 years of autonomous operation
Early low battery notifications
Unique wireless technology
Jeweller is Ajax�s proprietary radio protocol for secure two-way communication. It provides a block encryption and device authentication during each communication session with Ajax hub or radio signal range extender. Jeweller prevents sabotage, spoofing, and data theft.
Up to 1,200 m of communication range in an open space
Data encryption
Notification of jamming and connection loss
Automatic power adjustment
System supervision
All Ajax devices perform automatic self-diagnosis and report their states to the hub. Essential parameters, including tamper, communication, power supply, and sensor statuses, are continuously monitored. The Ajax Cloud server controls communication between the hub and Ajax apps, ensuring instant notifications for ARCs, security companies, and users. In case of any malfunction or communication failure, an engineer is informed immediately to provide necessary services.
Automatic device self-diagnosis with a state report
Regular polling to display the current device state in Ajax apps
Instant maintenance notifications
Sabotage protection
Tamper alarm
The bundled holding screw ensures a more reliable fastening and complicates unauthorized device dismantling. The tamper button alerts the monitoring company and users if the device is detached from the mounting panel or removed from the surface.
Data encryption
All stored and transmitted data in the system is protected by block encryption with a dynamic key. Encryption makes it extremely difficult to reprogram the device and replace or steal the data.
Informative notifications
An Ajax system instantly delivers informative notifications of alarms and events. Security companies and users receive precise details about each incident, including time, location, and the triggered device.
Device authentication against spoofing
During each communication session, the hub authenticates the device by checking the module�s unique parameters. If any parameter fails the check, the hub ignores the device commands.
Regular polling
The device regularly exchanges data with the hub. The system controls each device�s state and reports any malfunction or communication loss.
Communication loss detection
With minimal polling interval settings (3 data packages in 12 seconds), it takes 36 seconds to detect communication loss and notify the security company and users about the incident.
Effortless installation and setup
DoorProtect U Jeweller is ready to operate straight out of the box. It is easy to install with the SmartBracket mounting panel � no need to disassemble the enclosure. Ajax apps help quickly make the device a part of the ecosystem: simply pair the device with the hub by scanning the QR code. It can always be reconfigured remotely without the need for on-site visits.
Adding to the system
Installations
Setup
Monitoring
Pairing with the security system via a QR code
Effortless and secure installation with a SmartBracket mounting panel
Configuring and testing in the mobile Ajax PRO app
PRO Desktop app for macOS and Windows
Firesense is a leading independent UK distributor of fire detection, fire safety and security equipment, supporting professional installers and businesses across the country. Established in 1992 and based in Tunbridge Wells, the company has more than 30 years of experience within the fire and security industry.
Originally founded as a specialist manufacturer of conventional fire alarm control panels, Firesense has developed into a comprehensive supplier of fire detection, security, emergency lighting and life safety products. The company works with a wide range of recognised manufacturers, helping customers access reliable equipment for projects of different sizes and requirements.
Firesense supplies conventional, addressable, wireless and two-wire fire alarm systems alongside detectors, control panels, manual call points, sounders, cables, batteries, emergency lighting, fire alarm testing equipment and related accessories. Its expanding security range also includes CCTV, intruder alarm, access control and smart security solutions.
A key strength of Firesense is its experienced technical and account management team. Customers can receive practical product guidance and support when selecting equipment, designing systems or resolving technical enquiries. As an independent distributor, Firesense can recommend suitable products from across its available ranges rather than being restricted to a single manufacturer.
With extensive stock held at its Tunbridge Wells distribution centre, Firesense aims to provide fast and reliable nationwide supply, including rapid dispatch and trade counter collection.
For fire detection, security or life safety equipment, visit the Firesense website or speak with their experienced team for product advice, availability and help with your enquiry.
Firesense is a leading independent UK distributor of fire detection, fire safety and security equipment, supporting professional installers and businesses across the country. Established in 1992 and based in Tunbridge Wells, the company has more than 30 years of experience within the fire and security industry.
Originally founded as a specialist manufacturer of conventional fire alarm control panels, Firesense has developed into a comprehensive supplier of fire detection, security, emergency lighting and life safety products. The company works with a wide range of recognised manufacturers, helping customers access reliable equipment for projects of different sizes and requirements.
Firesense supplies conventional, addressable, wireless and two-wire fire alarm systems alongside detectors, control panels, manual call points, sounders, cables, batteries, emergency lighting, fire alarm testing equipment and related accessories. Its expanding security range also includes CCTV, intruder alarm, access control and smart security solutions.
A key strength of Firesense is its experienced technical and account management team. Customers can receive practical product guidance and support when selecting equipment, designing systems or resolving technical enquiries. As an independent distributor, Firesense can recommend suitable products from across its available ranges rather than being restricted to a single manufacturer.
With extensive stock held at its Tunbridge Wells distribution centre, Firesense aims to provide fast and reliable nationwide supply, including rapid dispatch and trade counter collection.
For fire detection, security or life safety equipment, visit the Firesense website or speak with their experienced team for product advice, availability and help with your enquiry.
For more information on Ajax DoorProtect U Jeweller (8EU) ASP - Black talk to Firesense Limited
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