Ajax FireProtect 2 RB is a wireless combined smoke and temperature detector for indoor use. It uses a dual‑spectrum optical smoke sensor and thermistors to detect both smouldering and fast‑flame fires. The RB variant uses replaceable CR123A batteries and can operate standalone (built‑in siren) or as part of an Ajax security system via the Jeweller radio protocol.

• Dual‑spectrum (visible + IR) optical smoke sensor for improved false‑alarm rejection.
• Temperature detection: high‑temperature alarm at >64 °C and fast‑rise alarm (Δ > 10 °C in 1 minute).
• Patented maintenance‑free smoke chamber that resists dust and insects.
• Built‑in piezo siren (~85 dB at 3 m), LED indicators and tamper detection.
• Interconnected alarm capability via Ajax hub — all linked detectors alarm within ~20 seconds of a trigger.
• Replaceable 2 × CR123A batteries (pre‑installed) with typical service life up to ~7 years (dependent on use).

Use cases: Ideal for residential and light commercial indoor fire detection. Can be used by DIY installers as a standalone audible detector or integrated into an Ajax system for monitored sites and professional installations.

Compliance & safety: EN 14604 listed on datasheet; UL/ULC variants available from Ajax for North American markets. Always follow local fire and electrical regulations. For monitored or life‑safety critical installations consult a qualified fire alarm engineer.