Ajax EN54 FireProtect (Heat/Smoke) Jeweller
Summary
The Ajax EN54 FireProtect (Heat/Smoke) Jeweller is a wireless addressable point detector combining both smoke and heat sensing in a single device, certified to EN 54-7 (smoke detectors), EN 54-5 (heat detectors), and EN 54-25 (wireless devices). It is designed for use within the Ajax EN54 fire alarm system and offers a flexible alternative to deploying separate detector types, making it particularly well suited to spaces where both smoke and rapid temperature rise present credible fire risks — such as commercial kitchens adjacent to corridors, plant rooms, or mixed-occupancy buildings.
Smoke detection uses Ajax’s patented dual-spectrum optical chamber, with blue and infrared LEDs analysing airborne particle size and the HazeFlow 2 algorithm distinguishing genuine smoke from steam or water vapour. Heat detection uses two built-in thermistors that respond to rapid temperature rise or a defined threshold exceedance. Crucially, the detector supports four operating modes — combined, independent, smoke-only, or heat-only — selectable in the Ajax PRO app. In combined mode, one sensor acts as primary while the secondary dynamically lowers its activation threshold as fire indicators develop, enabling fast and reliable alarm verification while minimising false alerts. In independent mode, either sensor can trigger the alarm immediately, providing the fastest possible response.
The device communicates with the Ajax EN54 CIE via the encrypted Jeweller radio protocol at ranges of up to 1,700 m in open space. Installation is fully wireless and cable-free, with all configuration handled remotely through the Ajax PRO app. Powered by two pre-installed CR123A batteries with up to five years of life, and mounted via the SmartBracket panel, the detector can be commissioned and adjusted without opening the enclosure — making it well suited to both new installations and retrofit projects.
Features
- Wireless addressable point detector combining smoke and heat sensing in a single housing
- Certified to EN 54-7 (smoke detectors), EN 54-5 (heat detectors), and EN 54-25 (wireless devices)
- Dual-spectrum optical smoke sensor with blue and infrared LEDs to assess particle size and identify smoke presence
- HazeFlow 2 algorithm distinguishes smoke from water vapour and steam, reducing false alarms
- Patented smoke chamber is dustproof and insect-resistant — no routine cleaning required
- Two built-in thermistors detect rapid temperature rise or threshold exceedance
- Heat detection modes: A1, A1R, A1S, B, BR, BS, C, CR, CS, and fixed temperature (EN 54-compliant modes: A1R, A1S, BR, BS, CR, CS)
- Four selectable detection modes — combined, independent, smoke-only, and heat-only — configured in the Ajax PRO app
- In combined mode, primary sensor triggers and secondary sensor dynamically lowers its threshold as fire develops, aiding alarm verification
- In independent mode, either sensor can trigger an alarm immediately for the fastest possible response
- Operates via Ajax Jeweller encrypted two-way radio protocol with a range of up to 1,700 m in open space
- Battery-powered with two pre-installed CR123A batteries — up to 5 years battery life
- Tool-free battery replacement via accessible battery compartment lids
- No mains wiring required — fully wireless installation
- Managed entirely via the Ajax PRO app — no need to open the enclosure for configuration
- SmartBracket mounting panel allows rotation of up to 90° post-installation
- Dual tamper protection — detects removal from the mounting panel and removal of the smoke chamber lid
- Optional SmartBracket lock prevents removal without a special tool
- Supports fire alarm automation scenarios configured within the Ajax system
- LED indicators (green, yellow, red) display detector state, including alarm and test modes
- Fault notifications sent automatically if the device is tampered with or malfunctions
- Automated maintenance reports available via Ajax PRO Desktop
- Available in black and white
- For indoor use only
FAQs
What standards does the Ajax EN54 FireProtect (Heat/Smoke) Jeweller comply with?
The device is certified to EN 54-7 (point-type smoke detectors), EN 54-5 (heat detectors), and EN 54-25 (components using radio links). It is designed specifically for use within EN 54-compliant fire alarm systems.
What is the difference between the combined and independent detection modes?
In combined mode, one sensor is designated as primary. When it detects signs of fire, the activation threshold of the second sensor is dynamically lowered to help verify the event. This provides reliable alarm confirmation while reducing false triggers from non-fire factors such as steam or temporary temperature changes. In independent mode, both sensors operate separately and either one can trigger a full alarm immediately — giving the fastest possible response at the expense of cross-verification.
Can the detector operate as a smoke-only or heat-only device?
Yes. In addition to combined and independent modes, the detector can be configured to operate in smoke-only or heat-only mode via the Ajax PRO app. This provides additional design flexibility when site conditions call for a single detection method.
Which heat detection classes are EN 54-compliant on this device?
The device supports multiple heat sensor modes including A1, A1R, A1S, B, BR, BS, C, CR, CS, and fixed temperature. Of these, only the following are compliant with EN 54-5 requirements: A1R, A1S, BR, BS, CR, and CS.
Does the detector need to be wired in?
No. The EN54 FireProtect (Heat/Smoke) Jeweller is fully wireless and powered by two pre-installed CR123A batteries, providing up to five years of battery life. No mains power or signal cabling is required, making it well suited to retrofits and installations where running cable is impractical.
What CIE is required for this detector?
The EN54 FireProtect (Heat/Smoke) Jeweller operates as part of the Ajax EN54 fire alarm system and must be connected to a compatible Ajax EN54 CIE, such as the Ajax EN54 FireHub Jeweller. It communicates via the Jeweller radio protocol and does not function as a standalone device.
Can the detector be configured without opening the enclosure?
Yes. All configuration — including detection mode, heat class, and alarm scenarios — is managed remotely via the Ajax PRO app. There is no need to open the enclosure, which saves time on-site and avoids disturbing the smoke chamber.
How is the device protected against tampering?
The detector has two tamper buttons — one that detects removal from the SmartBracket mounting panel and one that detects removal of the smoke chamber lid. An optional lock on the SmartBracket can also be engaged to prevent removal without a special tool. Any tamper event generates an immediate fault notification within the system.
What is included in the box?
The detector is supplied with two pre-installed CR123A batteries, a SmartBracket mounting panel, an installation kit, and a quick start guide.
Specifications
- Product Type: Wireless addressable point smoke and heat detector
- Standards: EN 54-7, EN 54-5, EN 54-25
- Smoke Detection Technology: Dual-spectrum optical sensor (blue and infrared LEDs)
- False Alarm Algorithm: HazeFlow 2
- Heat Detection: Two thermistors (rate-of-rise and fixed temperature)
- Heat Detection Modes: A1, A1R, A1S, B, BR, BS, C, CR, CS, fixed temperature (EN 54-compliant: A1R, A1S, BR, BS, CR, CS)
- Operating Modes: Combined, independent, smoke-only, heat-only
- Communication Protocol: Jeweller (encrypted two-way radio)
- Radio Range (Open Space): Up to 1,700 m
- Power Supply: 2 × CR123A battery (pre-installed)
- Battery Life: Up to 5 years
- Dimensions: 124 × 124 × 54.2 mm
- Weight: 278 g
- Operating Temperature: −10°C to +50°C
- Operating Humidity: Up to 80%
- Protection Class: IP21C
- Flammability Rating: UL 94 V-0
- Tamper Protection: Dual tamper buttons (panel removal and smoke chamber lid removal)
- Mounting: SmartBracket mounting panel (rotatable up to 90° post-installation)
- Colour Options: Black, white
- Installation Environment: Indoor use only
- In The Box: Detector, 2 × CR123A battery (pre-installed), SmartBracket mounting panel, installation kit, quick start guide
Downloads
- Datasheet (Adobe PDF)