Ajax FireProtect 2 SB Black Wireless Heat & Smoke Detector

Ajax FireProtect 2 SB (Heat/Smoke) Black Wireless Fire Detector

The Ajax FireProtect 2 SB (Heat/Smoke) is a compact, battery-powered wireless fire detector built to protect homes and small commercial spaces from smouldering and fast-developing fires while keeping false alarms to a minimum. Combining a dust- and insect-resistant optical smoke chamber with dual heat-sensing thermistors, it delivers accurate, near-instant detection and reports directly to your Ajax security system via the encrypted Jeweller radio protocol. The "SB" designation means the unit ships with sealed, non-replaceable lithium cells rated for a decade of maintenance-free operation, making it ideal for ceilings and hard-to-reach locations.

Key Features

• Dual-spectrum smoke sensing: Uses blue and infrared LEDs together with a proprietary HazeFlow analysis algorithm to tell real smoke apart from steam or dust, cutting down nuisance alerts.
• Twin thermistor heat detection: Positioned outside the enclosure, the two Class A1R thermistors react quickly to abnormal temperature rises, even in smokeless fires.
• Long-life sealed battery: Non-replaceable lithium batteries are rated for up to 10 years of autonomous operation, so there's nothing to swap out.
• Loud built-in siren: An 85 dB piezo siren sounds locally for alarms and system events until the issue is resolved or muted.
• Wireless Jeweller connectivity: Communicates with an Ajax hub over an encrypted radio link with a floating key, with an open-space range of roughly 1,700 metres.
• Standalone or connected operation: Can function on its own as an independent smoke/heat alarm or as part of a full Ajax security and fire ecosystem.
• Self-monitoring: A status LED and tamper button flag issues such as low battery, a contaminated smoke chamber, or unauthorised removal from the mounting bracket.
• Certified performance: Meets EN 54-5 and BS 5446-2 requirements for Class A1R heat detectors.
• Sleek, low-profile design: A discreet black finish and SmartBracket mounting plate suit modern ceilings and ensure quick, tool-light installation.

Where to Use It

This detector suits bedrooms, living areas, hallways, home offices, rental apartments, and small commercial rooms where a hardwired system isn't practical. Because it can run independently of a hub, it's a flexible option for standalone protection, while integration into an Ajax system unlocks smartphone alerts, scenario automation (such as cutting power to appliances), and interconnected alarms that trigger every fire detector on site within seconds of a threat being detected.

What's in the Box

• FireProtect 2 SB (Heat/Smoke) detector unit, Black
• SmartBracket mounting panel
• Mounting screws and anchors
• Quick start guide

Frequently Asked Questions

Does this detector need an Ajax hub to work?
No — it can operate as a standalone smoke and heat alarm, though connecting it to an Ajax hub adds remote notifications and automation.

How long will the battery last?
The sealed lithium battery is designed to last up to 10 years under normal use, after which the whole detector is replaced.

What does the 'SB' in the name mean?
SB stands for Sealed Battery — the detector uses built-in, non-replaceable cells rather than user-swappable batteries.

Additional Resources

• More info