The Ajax EN54 FireProtect (Smoke/Sounder) Jeweller White is a wireless, EN54-certified point smoke detector with a built-in fire alarm sounder, designed for professional fire detection in residential, commercial and public buildings. Combining a dual-spectrum optical smoke sensor with a configurable multi-tone sounder, encrypted Jeweller communication and up to five years of battery life, it delivers certified fire detection and audible warning from a single wireless device.
Ajax EN54 FireProtect (Smoke/Sounder) Jeweller White Wireless Smoke Detector with Built-In Sounder
The Ajax EN54 FireProtect (Smoke/Sounder) Jeweller is a wireless addressable point smoke detector combined with a fire alarm sounder (model FP.54SA.J), developed for use in EN54-compliant fire detection systems. It detects the presence of smoke using a dual-spectrum optical sensor and provides an immediate high-volume audible warning through its integrated sounder, protecting occupants while transmitting alarm and event data to the Ajax control and indicating equipment (CIE) over the secure Jeweller radio protocol.
Unlike domestic-grade fire detectors, the EN54 FireProtect line is certified to the European EN 54 fire standards, making it suitable for commercial and regulated installations where certified equipment is required. This "Smoke/Sounder" model both detects smoke and sounds the alarm, allowing detection and warning to be delivered by one device.
Dual-Spectrum Optical Smoke Detection
The detector identifies smoke using a dual-spectrum optical sensor. Inside the sealed smoke chamber, blue and infrared LEDs emit light at two different wavelengths, allowing the detector to assess the size of volatile particles and reliably distinguish genuine smoke from harmless airborne particles.
The HazeFlow software algorithm processes sensor data to confirm real fire events and help reduce false alarms, while the patented smoke chamber design shields the sensor from dust, dirt and insects and does not react to water vapour.
Built-In EN 54-3 Sounder
An integrated sounder provides an immediate audible fire warning using a temporal alarm pattern compliant with EN 54-3. The sounder supports 32 selectable tones with a maximum output of up to 93 dB at 1 metre, and volume is configurable (Quiet / Loud / Very loud) to suit the environment.
When multiple FireProtect sounders are installed on the same system, their audible alerts are automatically synchronised so that all devices activate simultaneously, providing a clear, coordinated evacuation signal throughout the protected premises.
EN 54 Certified Fire Protection
The detector is certified under the Construction Products Regulation (CPR) to multiple parts of the European EN 54 standard:
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EN 54-7 — smoke detectors (point detectors using scattered light)
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EN 54-3 — fire alarm devices / sounders
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EN 54-25 — components using radio links
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EN 54-13 — system compatibility assessment
This certification makes the device suitable for professional and regulated fire detection installations where EN 54 compliance is mandatory.
Secure Jeweller Wireless Communication
The detector communicates with the Ajax CIE using the encrypted, two-way Jeweller radio protocol, with a communication range of up to 1,700 metres in open space to the hub or a compatible range extender.
Jeweller provides frequency hopping, device authentication and block encryption with a dynamic key to protect against interference and spoofing. The device polls the hub at regular intervals, and loss of communication is detected and reported so faults never go unnoticed.
Long Battery Life
The detector is powered by two pre-installed CR123A lithium batteries, providing up to five years of autonomous operation under normal conditions. Batteries can be replaced without tools, and the device includes reverse-polarity protection.
Battery status is continuously monitored and reported to the Ajax app, with early low-battery notifications sent in advance to allow planned maintenance.
Tamper and Sabotage Protection
The detector features two tamper buttons: one detects removal of the device from its SmartBracket mounting panel, and the other detects removal of the smoke chamber lid. Any tampering is immediately reported to system users and the monitoring company as a fault.
Device authentication protects against spoofing, ensuring only genuine Ajax devices can be paired with the system.
Quick Professional Installation
The included SmartBracket mounting panel enables straightforward installation without disassembling the detector. Once mounted, the detector can be rotated up to 90° to align the branding or LED, and an optional lock secures the device so it cannot be removed without a special tool.
The device is designed for indoor use only and should be installed at least 1 metre from the hub or range extender, in a position providing a Medium or Strong signal as required by EN 54.
KEY BENEFITS
- EN 54 certified for professional and regulated fire installations
- Detects smoke and sounds the alarm from a single wireless device
- Dual-spectrum optical sensor reliably identifies genuine smoke
- HazeFlow algorithm helps reduce false alarms
- Built-in sounder up to 93 dB with EN 54-3 compliant temporal pattern
- 32 selectable tones with configurable volume
- Synchronised audible alerts across all sounders in the system
- Encrypted Jeweller wireless communication up to 1,700 m
- Up to five years of battery life from pre-installed CR123A batteries
- Dual tamper protection against removal and chamber interference
- Patented smoke chamber shielded from dust, dirt and insects
- SmartBracket enables fast tool-free installation
- Available in White finish
- Suitable for residential, commercial and public buildings
KEY FEATURES
- Wireless addressable point smoke detector with built-in sounder
- Dual-spectrum optical smoke sensor (blue and infrared LEDs)
- HazeFlow false-alarm reduction algorithm
- Built-in sounder up to 93 dB at 1 m
- 32 selectable tones; EN 54-3 compliant patterns
- Configurable volume (Quiet / Loud / Very loud)
- Automatic sounder synchronisation across devices
- Certified to EN 54-3, EN 54-7, EN 54-25 and EN 54-13
- Secure Jeweller two-way wireless protocol
- Communication range up to 1,700 m in open space
- 2 × CR123A batteries pre-installed
- Battery life up to 5 years
- Tool-free battery replacement with reverse-polarity protection
- Dual tamper buttons (mount and chamber lid)
- SmartBracket mounting panel, rotatable up to 90°
- IP21C protection rating
- UL 94 V-0 flammability rating
- Indoor installation only
- White finish
IDEAL FOR
- Offices and commercial premises
- Retail shops and shopping centres
- Hotels and hospitality venues
- Residential apartments and houses
- Public and educational buildings
- Warehouses and storage areas
- Hallways, corridors and escape routes
- Installations requiring EN 54 certified fire detection
- Premises needing combined detection and audible warning
- Professional Ajax fire and security systems
SYSTEM COMPATIBILITY
- Requires an Ajax control and indicating equipment (CIE) / hub running an up-to-date OS Malevich
- Compatible with Ajax Hub 2 (2G)
- Compatible with Ajax Hub 2 (4G)
- Compatible with Ajax Hub 2 Plus
- Compatible with Ajax Hub Hybrid (2G)
- Compatible with Ajax Hub Hybrid (4G)
- Compatible with Ajax ReX 2 range extender
- Uses Ajax Jeweller encrypted wireless communication
- Pairs with one CIE / hub at a time
- Managed via Ajax mobile applications (iOS and Android)
- Managed via Ajax desktop applications (Windows and macOS)
- Supports Ajax Cloud remote management
- Supports Over-the-Air (OTA) firmware updates
| Specification |
Details |
| Brand |
Ajax |
| Model |
EN54 FireProtect (Smoke/Sounder) Jeweller |
| Article Number |
119919.276.WH1 |
| Device Model Code |
FP.54SA.J |
| Product Type |
Wireless Point Smoke Detector with Built-In Sounder |
| Product Line |
EN54 FireProtect |
| Detection Technology |
Dual-Spectrum Optical Smoke Sensor |
| False Alarm Prevention |
HazeFlow Algorithm |
| Sounder Output |
Up to 93 dB at 1 m |
| Sounder Tones |
32 selectable tones |
| Sounder Volume Settings |
Quiet / Loud / Very loud |
| EN 54 Certifications |
EN 54-3, EN 54-7, EN 54-25, EN 54-13 |
| Wireless Technology |
Jeweller |
| Radio Communication Range |
Up to 1,700 m (open space) |
| Tamper Protection |
Yes – dual (mount and chamber lid) |
| LED Indication |
Yes |
| Power Supply |
2 × CR123A Lithium Batteries (Pre-installed) |
| Battery Life |
Up to 5 Years |
| Battery Replacement |
Tool-free, reverse-polarity protected |
| Protection Rating |
IP21C |
| Flammability Rating |
UL 94 V-0 |
| Operating Temperature |
0°C to +50°C |
| Operating Humidity |
Up to 80% Non-condensing |
| Dimensions |
124 × 124 × 48 mm |
| Weight |
295 g |
| Colour |
White |
| Material |
High-quality Plastic |
| Mounting |
SmartBracket Mounting Panel |
| Indoor / Outdoor |
Indoor Use Only |
| Warranty |
24 Months |
FREQUENTLY ASKED QUESTIONS (FAQs)
What is the Ajax EN54 FireProtect (Smoke/Sounder) Jeweller used for?
It is a wireless EN54-certified point smoke detector with a built-in fire alarm sounder. It detects smoke using a dual-spectrum optical sensor and provides an immediate audible warning through its integrated sounder, transmitting alarm and event data to the Ajax control and indicating equipment (CIE) over the secure Jeweller protocol. It is suitable for professional fire detection in residential, commercial and public buildings.
What does EN54 certification mean?
EN 54 is the European standard for fire detection and fire alarm systems. This detector is certified under the Construction Products Regulation to EN 54-3 (sounders), EN 54-7 (smoke detectors), EN 54-25 (radio-linked components) and EN 54-13 (system compatibility), making it suitable for regulated and professional fire installations.
What is the difference between this and the Smoke-only version?
The "Smoke/Sounder" model combines an optical smoke sensor with a built-in sounder, so it both detects smoke and sounds the alarm. The Smoke-only version detects smoke but does not include an integrated sounder, and a separate Sounder-only version provides audible warning without smoke detection.
How loud is the built-in sounder?
The sounder produces up to 93 dB at 1 metre, using an EN 54-3 compliant temporal alarm pattern. It offers 32 selectable tones and three volume settings (Quiet, Loud, Very loud), and audible alerts are automatically synchronised across all FireProtect sounders in the system.
Does it need a specific Ajax hub?
Yes. The detector requires an Ajax control and indicating equipment (CIE) / hub running an up-to-date OS Malevich, such as the Hub 2 (2G/4G), Hub 2 Plus or Hub Hybrid. Always confirm compatibility using the Ajax compatibility tool before purchase.
How does it avoid false alarms?
The dual-spectrum optical sensor assesses the size of airborne particles using blue and infrared light, and the HazeFlow software algorithm processes this data to confirm genuine fire events. The patented smoke chamber is shielded from dust, dirt and insects and does not react to water vapour, helping to minimise false activations.
How is the detector powered?
It operates from two pre-installed CR123A lithium batteries, providing up to five years of autonomous operation under normal conditions. Batteries can be replaced without tools, and status is monitored and reported in the Ajax app with early low-battery notifications.
Can it be installed outdoors?
No. The EN54 FireProtect (Smoke/Sounder) Jeweller is designed for indoor use only and carries an IP21C protection rating. It should be installed indoors, away from areas with excessive dust, steam or temperature extremes.
Is it protected against tampering?
Yes. The detector has two tamper buttons — one detects removal from the SmartBracket mounting panel and the other detects removal of the smoke chamber lid. Any tampering is reported immediately to system users and the monitoring company.
What colour options are available?
This product (article 119919.276.WH1) is the White version. A Black variant is also available under a separate article number.
