Ajax FireProtect 2 AC Black Mains-Powered Heat, Smoke & CO Detector

Ajax FireProtect 2 AC (Heat/Smoke/CO) - Black Wireless Fire Detector

The Ajax FireProtect 2 AC is a mains-powered, wirelessly connected fire detector that combines heat, smoke, and carbon monoxide sensing in a single black enclosure. Built for residential and light commercial use, it runs on 110-240V AC power with a sealed backup battery, so protection continues even during a blackout. As part of the Ajax security ecosystem, it communicates with an Ajax hub over the encrypted Jeweller radio protocol, delivering real-time alerts and remote monitoring through the Ajax mobile app.

Key Features

• Triple-hazard detection: Combines a dual-spectrum optical smoke sensor, two external thermistors for rapid heat-rise detection, and a dedicated CO sensor in one unit.
• HazeFlow 2 smoke algorithm: Uses blue and infrared LEDs to tell real smoke apart from steam or dust, reducing false alarms.
• Self-cleaning smoke chamber: A dustproof, insect-resistant design keeps the optical sensor accurate without regular manual cleaning.
• Loud built-in siren: An 85 dB buzzer with distinct tone and LED patterns lets occupants instantly identify whether the alarm is for smoke, heat, or CO.
• Mains power with battery backup: Operates from 110-240V AC and automatically switches to its internal backup battery if power is lost, rated for a 10-year working life.
• Interconnected alarms: When one detector triggers, the hub sounds every linked FireProtect 2 unit on-site within roughly 20 seconds; if hub contact is lost, detectors can still alert each other directly within about a minute.
• Long wireless range: Communicates with an Ajax hub over the Jeweller protocol at distances of up to 1,700 metres line-of-sight, and can be extended further with a ReX range extender.
• Fast, tidy installation: Fitted with an improved mounting panel and WAGO connectors for quick wiring, plus optional CableTrunk accessory for hiding the power cable.
• Tamper and fault monitoring: Includes tamper protection and automatic malfunction alerts for issues like chamber contamination or battery depletion.

Where It's Used

This detector suits homes, apartments, and small commercial spaces where a single ceiling-mounted device needs to cover multiple fire risks at once, such as kitchens, living areas, garages, or plant rooms near fuel-burning appliances. Because it draws power from the mains, it is ideal for permanent installations where long-term battery swaps are impractical, while still keeping full protection during outages thanks to its backup cell. It integrates neatly into a wider Ajax intrusion and life-safety system, letting security companies and homeowners monitor fire events alongside burglary and automation devices from the same app.

What's in the Box

• Ajax FireProtect 2 AC (Heat/Smoke/CO) detector - Black
• SmartBracket mounting panel
• Installation and wiring kit (including WAGO connectors)
• Quick start guide

Frequently Asked Questions

Does it need an Ajax hub to work? The detector can sound its local siren independently, but connecting it to an Ajax hub unlocks remote notifications, interconnected alarms, and app-based monitoring.

What happens during a power outage? The unit automatically switches to its internal backup battery, so heat, smoke, and CO monitoring continue uninterrupted.

Can it be mounted outdoors? No, this detector is designed strictly for indoor installation.

Additional Resources

• More info