MAKE IT YOURS
DoorProtect U.
Wireless reed-switch opening detector
Standards and certifications
DoorProtect U Jeweller · DP.S.J-000-EU. Manufacturer-listed marks; regional and installation conditions apply.
Know when the entrance opens.
DoorProtect U Jeweller monitors doors and windows with a magnetic contact that can be fitted on either side of the detector. It sends opening events to the Ajax system and supports an additional wired normally closed contact. Configure its behaviour and check device status in the same app.
Key features. At a glance.
2 reed switches1
the magnet can be placed on the left or right side of the detector
More installation options
with two magnets included
Chime feature2
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 colors
of matte enclosure
Informative push notifications
Up to 1,200 m3
communication range with an Ajax hub or range extender
Power adjustment
Hassle-free installation
- 1Use one supplied magnet on one side only. Small magnet: up to 1 cm. Large magnet: up to 2 cm.
- 2Requires compatible equipment and Chime settings. The detector itself does not produce the sound.
- 3In an open space. Range is measured in open space; walls and installation conditions reduce it.
Ajax product information ↗ · DoorProtect U Jeweller specifications ↗
Protection in real places.
Know when an entrance opens.
A contact on either side
Opening the door or window moves the magnet away from the reed switch and sends an event to the Ajax system. Two reed switches give a choice of mounting side.
Use one magnet only: up to 1 cm separation for the small magnet or 2 cm for the large one. Brief reed-switch vibrations up to 0.15 seconds are filtered. Test the actual door or window.
Bring an extra contact into the same system.
A normally closed input
Connect a compatible third-party wired contact and enable External Contact in the app. The detector relays its events through Jeweller.
This input does not supply power to another detector. Follow both devices’ connection instructions and test the external contact separately.
Useful feedback when the system is disarmed.
A chime for an opening
Enable Chime for this opening detector and a compatible siren or keypad buzzer. Opening the door can then produce a short notification sound without arming the system.
The sound comes from the configured siren or keypad, not from DoorProtect itself.
Power you can keep track of.
Replaceable batteries
Up to seven years of operation from one preinstalled CR123A battery under the stated conditions. Battery status and replacement warnings are available in the Ajax app.
Indoor use: −10°C to +40°C, IP50 and IK04. Actual battery life depends on activity, polling settings, temperature and signal quality.
A secure link to your system.
Jeweller communication
Encrypted two-way communication carries commands, alarms and device status between the device and its compatible Ajax hub or assigned range extender.
Up to 1,200 m in open space. Walls, metal and other obstacles reduce usable coverage. Check signal strength at the installation position and use equipment for the same radio-frequency region.
Reach rooms beyond the direct radio link.
Plan the complete communication path
A compatible assigned range extender can connect a detector where the direct hub link is weak. Test the detector-to-extender path and the extender-to-hub path at their installed positions.
A range extender increases coverage, not the hub’s total device capacity. Ethernet on a supported extender is its connection to the hub; the detector itself stays wireless.
Protection that also watches itself.
Removal alerts
The tamper reports removal from the mounting panel. Secure the panel’s tamper fixing point and the holding screw, then test the removal event.
Connection and device status
Regular exchanges let the hub monitor the detector and report missing communication or a fault. Named events identify the device and room.
Connection-loss detection depends on the polling settings. Notifications require the configured system communication paths.
Authenticated communication
The hub authenticates the device during communication. Encryption protects exchanged commands and events against interception and spoofing.
Set up for the way the site works.
Connect
Scan the device QR code in the Ajax app, then assign a recognisable name and room. Check compatibility with the hub and any range extender before installation.
Find the right opening detector.
Compare protection for doors and windows across Baseline, Superior and Fibra. See which events a detector can notice and how it fits your frame, wiring and everyday use.
Compare opening detectors →Every detail, in one place.
Communication
- Jeweller communication technology
- Two-way system communication for the functions specified for this model.
- Radio signal range
- up to 1,200 m Between detector and control panel (or range extender) in an open space.
- Encrypted communication
- Encrypted device communication.
- Frequency hopping
- Radio communication uses frequency hopping to prevent interception and jamming.
Detection
- Sensitive elements
- 2 reed switches The magnet can be installed to the left or right side of the detector.
- Magnets
- small and big one come in the set The small magnet operates at a distance of up to 1 cm from the detector, and the big magnet — up to 2 cm.
- Protection against reed switch chattering
- The detector ignores vibrations lasting up to 0.15 s.
- Input to connect an additional detector
- Wired detector with the normally closed (NC) contact type.
- Chime
- The siren makes a special sound to notify that the opening detectors are triggered when the system is disarmed.
Sabotage protection
- Tamper alarm
- Notifications on attempts to detach the detector from the surface or remove it from the mounting panel.
- Holding screw
- to secure the detector on SmartBracket
- Protection against spoofing
- device authentication
- Communication loss detection
- after 36 s Detection time depends on the Jeweller or Jeweller/Fibra settings.
Power supply
- Battery
- 1 × CR123A Pre-installed.
- Calculated battery life
- up to 7 years
- Detector’s operating voltage range
- 2.1−3.3 V⎓
- Full capacity
- 1,600 mAh
Enclosure
- Detector dimensions
- 103 × 22 × 21 mm
- Dimensions of the big magnet
- 103 × 22 × 21 mm
- Dimensions of the small magnet
- 55 × 11 × 6 mm
- Weight of the white detector
- 37 g
- Weight of the black detector
- 34 g
- Operating temperature range
- from -10 °C to +40 °C
- Operating humidity
- up to 75%
What’s in the box
- DoorProtect U Jeweller
- SmartBracket mounting panel with holding screw
- CR123A battery (pre-installed)
- Big magnet
- Small magnet
- Outside-mounted terminal clamp
- Installation kit
- Quick start guide
For your installation
- Confirm the supported control panel, device software and regional radio version; test coverage at the final installation position.
- Do not install the detector using both magnets at the same time. The detector recognizes only one magnet on one side of the detector — left or right.
- The device is designed for indoor use only.
Find the right protection.
DoorProtect Plus U Jeweller
Choose opening-only detection or add shock and tilt for the protected entrance.
HomeSiren U Jeweller
A compatible siren can provide alarm sound and configured Chime.