Ajax FireProtect 2 SB White Wireless Smoke, Heat & CO Detector

Ajax FireProtect 2 SB (Heat/Smoke/CO) White

The Ajax FireProtect 2 SB is a wireless, all-in-one fire and gas safety sensor that combines smoke, heat and carbon monoxide detection in a single compact housing. Built on Ajax's Jeweller radio protocol, it can be added to an existing Ajax security system for centralised monitoring, or run entirely on its own as a standalone life-safety device. The sealed-battery (SB) version is designed for long-term, maintenance-light use, with a 10-year power supply built in so there is no need to swap batteries throughout the unit's service life.

Key Features

• Triple-hazard detection: a dual-spectrum optical sensor for smoke, dual thermistors for rapid heat detection, and a dedicated electrochemical sensor for carbon monoxide.
• Smoke vs. steam recognition: the optical sensor analyses particle size to tell genuine smoke apart from water vapour, helping to cut down on false alarms in kitchens and bathrooms.
• Sealed 10-year power cell: two non-replaceable lithium batteries power the detector and CO sensor for a full decade without maintenance.
• Loud built-in siren: an 85 dB audible alarm clearly signals fire, CO danger or a system fault.
• Fast interconnected alarming: when linked to an Ajax hub, all fire detectors on-site sound together within roughly 20 seconds of a threat being detected.
• Hub-independent fallback: if hub communication drops out, compatible units can still trigger each other directly so the alarm still spreads.
• Sealed, self-cleaning smoke chamber: a shielded chamber design keeps out dust, dirt and insects without needing regular cleaning.
• Tamper and fault monitoring: the detector reports if it's removed from its mounting bracket or if the enclosure is opened.
• Simple test/mute control: a single front-panel button lets users run a smoke chamber self-test or silence a non-critical alert.

Where It Fits

This detector suits bedrooms, living areas, hallways and other indoor spaces in homes, apartments and small offices where fire and carbon monoxide risks need to be covered by one device. It's a strong fit for properties already running an Ajax alarm system, since it integrates directly with the hub and app for remote status checks and instant push notifications, while still functioning as a capable stand-alone alarm if no hub is present. Because it is rated for indoor use only, it should be mounted on ceilings or walls away from steam, exhaust fumes and direct weather exposure.

What's in the Box

• FireProtect 2 SB (Heat/Smoke/CO) Jeweller detector
• SmartBracket mounting panel
• Installation kit (screws and mounting hardware)
• Quick start guide

Frequently Asked Questions

Do I need an Ajax hub to use this detector? No. It can operate independently with its own local siren, though pairing it with an Ajax hub adds remote alerts, app monitoring and interconnected alarming with other Ajax fire devices.

Can the batteries be replaced? The SB version uses sealed, non-replaceable lithium batteries rated for around 10 years. Once they're depleted, the unit is intended to be replaced rather than re-batteried.

Will steam from a shower or kettle set it off? The optical sensor is designed to distinguish smoke particles from water vapour, which reduces (though can't fully eliminate) nuisance alarms from steam in kitchens and bathrooms.

Additional Resources

• More info