Ajax FireProtect 2 RB (Heat/CO)
Communication & notifications
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Communication with the Ajax Hub works with the Jeweller protocol: two-way encrypted connection, frequency hopping and authentication ensure reliability and resilience (range up to ~1 700 m in open area).
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A low battery warning is sent at least 30 days before the battery runs out, via the app and the device LED.
Alert functions
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Built-in 85 dB siren (~3 m distance) distinguishes sound and LED pattern for smoke/heat or CO alarm.
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If one sensor detects a threat, the sirens of all FireProtect sensors in the system will be activated for a maximum of 20 seconds, even if the hub is not connected to the internet.
Heat detection (Heat)
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Meets Class A1R standards (EN 54-5, BS 5446-2). An alarm will be given:
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If the temperature rises above ~64 °C, or
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If the temperature rises more than ~10 °C per minute
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Detection of carbon monoxide (CO)
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A chemical CO sensor that alarms at the following levels:
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50 ppm ≈ 90 min,
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100 ppm ≈ 40 min,
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300 ppm ≈ 3 min,
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400 ppm ≈ life-threatening within ~3 hours – the device will stop alarming if CO levels drop below 50 ppm in a minute.
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Sensor lifetime up to 10 years, after which it is recommended to replace the device.
Power & lifetime
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Powered by 2 × CR123A batteries (1600 mAh), up to 7 years of battery life
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The overall lifetime of the device is up to 10 years, after which sensitivity may decrease and the device should be replaced.
LED indicators
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LED indicator:
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Green: power on (flashes once every 56 seconds)
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Yellow: alarm – e.g. low battery, malfunction, end of life.
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Red: danger detected (CO or temperature alarm)
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Tamper: informs of removal from base
Installation and maintenance
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For indoor use only (IP20).
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Installed under the ceiling using SmartBracket mounts, which allow the device to be aligned at an angle of at least 90° after mounting.
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Possibility to perform a hand test with the app or front panel button – test activates the siren and checks the sensor functions.
Summary of technical data
| Feature | Description |
|---|---|
| Types of car | Heat (A1R) & Carbon monoxide (CO) |
| Temperature alarm | >64 °C or >10 °C per minute |
| CO alarm levels | 50, 100, 300, 400 ppm depending on time |
| Aku | 2 × CR123A (replaceable) |
| Working time | Battery capacity up to 7 years, lifetime up to 10 years |
| Siren volume | 85 dB (~3 m away) |
| Community | Jeweller (encrypted, up to ~1 700 m open area) |
| Alarm synchronisation | <20 sec to activate buzzer |
| LED indicators | green/yellow/red |
| Anti-sabotage | Tamper faults, false connection detection |
| Installation | Indoors, on the ceiling with SmartBracket |
| Dimensions / weight | ca 124 × 124 × 45 mm; ~150-275 g depending on model |
| Guarantee | 2 years by Ajax Systems |
| Certificates | EN/UL system standards (depending on region) |
Why choose the Heat/CO model?
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You can combine heat and gas detection with just one device – a more convenient and space-saving option than two separate detectors.
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Suitable for rooms where a smoke detector may give false alarms but CO and temperature rise are a risk factor.
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Operates autonomously without a hub, still providing siren and LED alerts, or can be connected to an Ajax hub for remote monitoring and logging.
