The Ajax FireProtect 2 AC (Heat/Smoke/CO) Jeweller White is a mains-powered wireless fire detector that combines smoke, heat and carbon monoxide (CO) detection in a single device, with a built-in 85 dB siren and non-replaceable lithium backup battery. Using a dual-spectrum optical smoke sensor, dual Class A1R heat sensors, an electrochemical CO sensor and HazeFlow 2 filtering, it provides comprehensive protection against both fire and dangerous carbon monoxide.
Ajax FireProtect 2 AC (Heat/Smoke/CO) Jeweller White Mains-Powered Smoke, Heat & CO Detector
The Ajax FireProtect 2 AC (Heat/Smoke/CO) Jeweller is a wireless combined fire and carbon monoxide detector (model FP2.ACHSC.J) that detects smoke, dangerous temperature rise and hazardous CO concentrations. The "AC" designation indicates this model is externally (mains) powered at 110–240 V, with a non-replaceable lithium backup battery ensuring continued operation during a power outage.
It combines a dual-spectrum optical smoke sensor, two Class A1R thermistors and an electrochemical carbon monoxide sensor with Ajax's HazeFlow 2 filtering algorithm, providing early warning of fire while also protecting against the silent danger of carbon monoxide poisoning — all from a single wireless device.
Three-in-One Fire and CO Protection
This detector uniquely combines three sensing technologies: optical smoke detection, heat detection and carbon monoxide detection. This provides broader protection than a standard fire detector, guarding against smouldering fires, fast-flaming fires and the build-up of dangerous carbon monoxide gas from faulty fuel-burning appliances.
Carbon Monoxide Detection
An electrochemical CO sensor continuously monitors carbon monoxide concentration and raises the alarm at internationally recognised thresholds:
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50 ppm and above — alarm within 60–90 minutes
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100 ppm and above — alarm within 10–40 minutes
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300 ppm and above — alarm within 3 minutes
The detector stops signalling once the CO concentration falls back to a safe level of around 40 ppm, in line with carbon monoxide safety standards.
Mains Power with Battery Backup
The detector is mains-powered at 110–240 V~ (50/60 Hz), drawing up to 2 W. A non-replaceable lithium backup battery maintains protection during a mains failure, so the detector continues to operate and communicate even during a power outage.
Dual-Spectrum Optical Smoke Detection
The detector identifies smoke using a dual-spectrum optical sensor that assesses the size of airborne particles. The patented smoke chamber shields the sensor from dust, dirt and insects and does not react to water vapour, while the HazeFlow 2 algorithm reduces false alarms from steam and cooking fumes.
Class A1R Heat Detection
Two Class A1R thermistors monitor temperature and rate of rise. A high-temperature alarm triggers above 64°C, and a temperature-spike alarm activates when the temperature rises by more than 10°C within one minute.
Built-In Siren and LED Indication
An integrated 85 dB siren provides an immediate local audible warning, with distinct signals for fire and CO alarms. LED indication shows green for power, yellow for malfunction and red for alarm. Multiple FireProtect 2 detectors can sound a coordinated interconnected alarm.
Secure Jeweller Wireless Communication
The detector communicates with the Ajax hub using the encrypted, two-way Jeweller radio protocol, with a range of up to 1,700 metres in open space, with frequency hopping, device authentication and block encryption.
Tamper and Sabotage Protection
A built-in tamper alerts the system to any attempt to detach the detector or remove it from its mounting panel, and device authentication protects against spoofing.
Quick Professional Installation
The included SmartBracket mounting panel enables straightforward installation and allows the detector position to be adjusted after mounting. The device is designed for indoor use only.
KEY BENEFITS
- Combined smoke, heat and carbon monoxide protection in one device
- Mains-powered with non-replaceable lithium backup battery
- Electrochemical CO sensor guards against carbon monoxide poisoning
- Dual-spectrum optical smoke sensor with HazeFlow 2 filtering
- Dual Class A1R heat sensors with rate-of-rise detection
- Reduced false alarms from steam and cooking fumes
- Built-in 85 dB siren with distinct fire and CO signals
- Interconnected alarm across all FireProtect 2 detectors
- Encrypted Jeweller wireless communication up to 1,700 m
- Tamper protection against removal
- SmartBracket enables fast installation with post-fit adjustment
- Available in White finish
- Suitable for residential and commercial installations
KEY FEATURES
- Mains-powered wireless smoke, heat and CO detector
- Power supply 110–240 V~, 50/60 Hz, up to 2 W
- Non-replaceable lithium backup battery
- Dual-spectrum optical smoke sensor
- Electrochemical carbon monoxide sensor
- CO alarm thresholds 50 / 100 / 300 ppm
- Two Class A1R thermistors
- High-temperature alarm above 64°C
- Temperature-spike alarm at 10°C/minute rise
- HazeFlow 2 false-alarm filtering
- Built-in 85 dB siren
- LED indication (green / yellow / red)
- Interconnected fire alarm support
- Secure Jeweller two-way wireless protocol
- Communication range up to 1,700 m in open space
- Tamper protection
- SmartBracket mounting panel
- Certified to EN 14604 and EN 50291
- Indoor installation only
- White finish
IDEAL FOR
- Homes and apartments
- Properties with gas or solid-fuel appliances
- Offices and commercial premises
- Hotels and hospitality venues
- Rental and managed properties
- Boiler rooms and areas with fuel-burning equipment
- Installations requiring combined fire and CO protection
- Professional Ajax fire and security systems
SYSTEM COMPATIBILITY
- 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
- 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 |
FireProtect 2 AC (Heat/Smoke/CO) Jeweller |
| Article Number |
60834.176.WH1 |
| Device Model Code |
FP2.ACHSC.J |
| Product Type |
Mains-Powered Wireless Smoke, Heat & CO Detector |
| Product Line |
FireProtect 2 |
| Smoke Detection |
Dual-Spectrum Optical Sensor |
| Heat Detection |
2 × Class A1R Thermistor |
| CO Detection |
Electrochemical Sensor |
| CO Alarm Thresholds |
50 / 100 / 300 ppm |
| High-Temperature Alarm |
Above 64°C |
| Temperature-Spike Alarm |
10°C rise in 1 minute |
| False Alarm Prevention |
HazeFlow 2 |
| Built-In Siren |
85 dB at 3 m |
| Power Supply |
Mains 110–240 V~, 50/60 Hz (up to 2 W) |
| Backup Battery |
1 × Lithium (non-replaceable) |
| LED Indication |
Yes (green / yellow / red) |
| Interconnected Alarm |
Yes |
| Wireless Technology |
Jeweller |
| Radio Communication Range |
Up to 1,700 m (open space) |
| Tamper Protection |
Yes |
| Certification |
EN 14604, EN 50291 |
| Operating Temperature |
0°C to +50°C |
| Operating Humidity |
Up to 80% Non-condensing |
| Dimensions |
122 × 122 × 54 mm |
| Weight |
330 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 FireProtect 2 AC (Heat/Smoke/CO) Jeweller used for?
It is a mains-powered wireless detector that combines smoke, heat and carbon monoxide detection in one device, with a built-in 85 dB siren. It provides comprehensive protection against fire and CO poisoning and communicates with the Ajax hub over the secure Jeweller protocol.
What does the CO sensor add over the Heat/Smoke version?
In addition to detecting smoke and heat, this model includes an electrochemical carbon monoxide sensor that warns of dangerous CO build-up from faulty fuel-burning appliances — a hazard that fire detectors alone cannot sense.
At what CO levels does it alarm?
It follows recognised CO safety thresholds: 50 ppm within 60–90 minutes, 100 ppm within 10–40 minutes, and 300 ppm within 3 minutes. It stops signalling once the concentration returns to a safe level of around 40 ppm.
What does the "AC" mean?
"AC" indicates the detector is externally (mains) powered at 110–240 V, with a non-replaceable lithium backup battery for continued operation during a power outage.
How does it reduce false alarms?
The dual-spectrum optical sensor assesses particle size, the patented smoke chamber is shielded from dust and insects and does not react to water vapour, and the HazeFlow 2 algorithm filters out steam and cooking fumes.
Can it be installed outdoors?
No. The FireProtect 2 AC (Heat/Smoke/CO) Jeweller is designed for indoor use only.
What colour options are available?
This product (article 60834.176.WH1) is the White version. A Black variant is also available under a separate article number.
