Ajax FireProtect 2 SB Wireless Heat & Smoke Detector White

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

The Ajax FireProtect 2 SB (Heat/Smoke) is a wireless fire detector built to give early, reliable warning of smoke and rapid temperature rise inside homes and small commercial spaces. Powered by two sealed, non-replaceable lithium batteries rated for roughly ten years of use, this sealed-battery (SB) version is designed for long-term, low-maintenance protection. It communicates over Ajax's proprietary encrypted Jeweller radio protocol and can operate either as part of a full Ajax security ecosystem or as a standalone detector without a hub.

Key Features

• Dual-spectrum optical smoke sensor that uses blue and infrared light to tell real smoke apart from steam or dust, reducing nuisance alarms.
• Fast-reacting thermistor that detects rapid heat build-up, useful for catching smouldering or smokeless fires early.
• Dustproof, insect-resistant smoke chamber that keeps performing accurately without the need for regular cleaning.
• Built-in 85 dB siren with distinct tones for alarms, faults, and low-battery warnings.
• Long-life sealed battery pack good for up to ten years, removing the hassle of periodic battery swaps.
• SmartBracket mounting plate with tamper protection that alerts if the unit is removed or the enclosure opened.
• Interconnected alarm response - when one fire detector triggers, the hub can sound every fire detector on site within roughly 20 seconds.
• Test/Mute button on the front panel for quick self-testing or silencing an alert.
• Wireless range up to 1,700 m in open space via the Jeweller protocol, with encrypted, authenticated communication.

Where It Fits

This detector suits bedrooms, living areas, hallways, and home offices where early warning of fire and heat is essential but a full smoke-plus-CO sensor isn't required. Because it can work independently of a hub, it also suits smaller standalone installations, while integration into a larger Ajax system unlocks scenario automation, such as cutting power to appliances or triggering strobes to aid evacuation.

What's in the Box

• FireProtect 2 SB (Heat/Smoke) detector - White
• SmartBracket mounting panel
• Installation and mounting kit
• Quick start guide

Frequently Asked Questions

Does this detector need an Ajax hub to work?
No. It can operate as a standalone fire alarm, though connecting it to an Ajax hub adds remote monitoring, notifications, and automation scenarios.

Can the batteries be replaced?
No. The SB version uses sealed lithium batteries rated for around ten years; once depleted, the whole unit is replaced rather than the batteries.

Is this the version with a CO sensor too?
No, this is the Heat/Smoke variant only. Ajax also sells a Heat/Smoke/CO version for detecting carbon monoxide as well.

Additional Resources

• More info