Ajax FireProtect 2 RB (Heat/Smoke/CO) white

Ajax FireProtect 2 RB (Heat/Smoke/CO)

Key features

Fire detection

• Smoke sensor: a dual-spectrum optical sensor detects smoke particles and distinguishes smoke from ordinary water vapour. The device uses Ajax's patented smoke detection algorithm and a dust-resistant smoke chamber.

• Heat sensor (Class A1R thermistors): detects a sustained temperature rise above ~64 °C or a rapid rise (> 10 °C) within one minute.

Carbon monoxide (CO) detection

• The electrochemical CO sensor detects*:

  • 50 ppm (0.005 %) – within a maximum of 90 min

  • 100 ppm (0.01 %) – within up to 40 min

  • 300 ppm (0.03 %) – within approx. 3 min

  • 400 ppm (0.04 %) is life-threatening within 3 hours

• Sensor service life of up to 10 years after installation.

Power and service life

• Powered by two replaceable CR123A batteries (1600 mAh).

• A low battery warning is sent at least 30 days in advance, via both the device's LED indicator and the Ajax app.

• In line with the standard, the device has an overall service life of 10 years, after which replacing the detector is recommended.

Alarm signal and connectivity

• The built-in siren sounds at ~85 dB (measured at a distance of 3 m), with different sound patterns for smoke, heat and CO alarms.

• When one detector senses a hazard, all other FireProtect detectors connected to the system are automatically activated within 20 seconds – even if the hub is offline.

• The detector communicates with the Ajax Hub via the two-way Jeweller protocol, with a communication range of up to ~1,700 m in open space.

Design and installation

• Dimensions: ~124 × 124 × 45 mm, weight approx. 275 g

• For indoor installation only. Recommended to be mounted directly in the centre of the ceiling or in another suitable location using the SmartBracket mounting plate. One detector covers an area of ~50–60 m²; in corridors, installation at intervals of up to 7.5 m is recommended.

• When installing, avoid light fittings, sloped areas and features that may obstruct detection.

Convenience features and maintenance

• The device can be tested manually using the Test/Mute button on the front or remotely via the Ajax app.

• Automatic self-checks and maintenance; lets you monitor connection status, faults and EOL notifications via the app. Monthly testing is recommended.

Technical specifications

Why choose this model?

• Smoke, heat and carbon monoxide detection in a single device – no need to install several separate detectors.

• The synchronised local alarm works even when the system is not connected to the internet.

• Long service life with replaceable batteries and automatic monitoring across the entire system.