The Ajax EN54 FireProtect (Heat/Sounder) Jeweller White is a wireless, EN54-certified point heat detector with a built-in fire alarm sounder, designed for professional fire detection in environments where smoke detectors are unsuitable. Combining dual-thermistor heat sensing with a configurable multi-tone sounder, encrypted Jeweller communication and up to five years of battery life, it delivers certified heat detection and audible warning from a single wireless device.

Ajax EN54 FireProtect (Heat/Sounder) Jeweller White Wireless Heat Detector with Built-In Sounder

The Ajax EN54 FireProtect (Heat/Sounder) Jeweller is a wireless addressable point heat detector combined with a fire alarm sounder (model FP.54HA.J), developed for use in EN54-compliant fire detection systems. It detects fire by monitoring temperature and rate of temperature rise using two thermistors, and provides an immediate high-volume audible warning through its integrated sounder, transmitting alarm and event data to the Ajax control and indicating equipment (CIE) over the secure Jeweller radio protocol.

Heat detection is ideal for areas where smoke detectors would be prone to false alarms — such as kitchens, garages, workshops and dusty or steamy environments — providing certified fire protection where optical smoke detection is unsuitable. This "Heat/Sounder" model both detects heat and sounds the alarm, allowing detection and warning to be delivered by one device.

Dual-Thermistor Heat Detection

The detector senses fire using two thermistors that monitor both the ambient temperature and the rate at which it rises. It responds to a fixed high-temperature threshold as well as rapid temperature increases, giving reliable detection across a range of fire scenarios.

The detector supports multiple EN 54-5 response classes — including A1R, A1S, BR, BS, CR and CS — combining rate-of-rise (R) and static (S) response types so the sensitivity can be matched to the installation environment.

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 89 dB at 1 metre, and volume can be configured 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:

• EN 54-5 — heat detectors (point detectors)
• EN 54-3 — fire alarm devices / sounders
• EN 54-25 — components using radio links
• 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 a tamper button that detects removal of the device from its SmartBracket mounting panel and immediately reports it 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 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 heat and sounds the alarm from a single wireless device
• Ideal for kitchens, garages and dusty or steamy areas unsuitable for smoke detectors
• Dual-thermistor sensing responds to high temperature and rapid temperature rise
• Multiple EN 54-5 response classes for flexible sensitivity
• Built-in sounder up to 89 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
• Tamper protection against removal
• SmartBracket enables fast tool-free installation
• Available in White finish
• Suitable for residential, commercial and public buildings

KEY FEATURES

• Wireless addressable point heat detector with built-in sounder
• Dual-thermistor heat sensing (fixed temperature and rate-of-rise)
• EN 54-5 response classes A1R, A1S, BR, BS, CR, CS
• Built-in sounder up to 89 dB at 1 m
• 32 selectable tones; EN 54-3 compliant patterns
• Configurable sounder volume
• Automatic sounder synchronisation across devices
• Certified to EN 54-5, EN 54-3, 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
• Tamper button (removal detection)
• SmartBracket mounting panel, rotatable up to 90°
• IP21C protection rating
• UL 94 V-0 flammability rating
• Indoor installation only
• White finish

IDEAL FOR

• Kitchens and cooking areas
• Garages and workshops
• Dusty or steamy environments
• Boiler and plant rooms
• Warehouses and storage areas
• Offices and commercial premises
• Hotels and hospitality venues
• Areas where smoke detectors are prone to false alarms
• Installations requiring EN 54 certified heat detection
• 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

FREQUENTLY ASKED QUESTIONS (FAQs)

What is the Ajax EN54 FireProtect (Heat/Sounder) Jeweller used for?

It is a wireless EN54-certified point heat detector with a built-in fire alarm sounder. It detects fire by monitoring temperature and rate of temperature rise using two thermistors, and provides an immediate audible warning through its integrated sounder. It is ideal for areas where smoke detectors are unsuitable, such as kitchens, garages and dusty or steamy environments.

When should I use a heat detector instead of a smoke detector?

Heat detectors are best for environments where smoke, steam, dust or fumes are normally present and would cause a smoke detector to false alarm — for example kitchens, garages, workshops and boiler rooms. Instead of sensing smoke particles, this detector reacts to high temperature and rapid temperature rise.

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 54-5 (heat detectors), EN 54-3 (sounders), EN 54-25 (radio-linked components) and EN 54-13 (system compatibility), making it suitable for regulated and professional fire installations.

How loud is the built-in sounder?

The sounder produces up to 89 dB at 1 metre, using an EN 54-3 compliant temporal alarm pattern. It offers 32 selectable tones and configurable volume, 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 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 (Heat/Sounder) Jeweller is designed for indoor use only and carries an IP21C protection rating.

What colour options are available?

This product (article 119915.274.WH1) is the White version. A Black variant is also available under a separate article number.