Ajax FireProtect 2 RB Fire Alarm - Heat, Smoke and CO
Wireless smoke, heat and carbon monoxide alarm.
- Alarms when smoke develops, temperature rises rapidly or CO levels increase.
- Works both independently and with a hub.
- Built-in 85 dB siren.
- Can be operated from mobile phone.
- Easy installation.
When activated, the alarm can both trigger the siren and call you on the phone.
| Technical specifications | |
| Color | WHITE/BLACK |
| Classification | Wireless smoke, heat, and CO detector with built-in siren |
| Type of detector | Wireless |
| Installation method | Indoors |
| Compatibility | Operates independently or with all Ajax hubs (OS Malevich 2.15.4 or later) and ReX 2 range extender |
| Sensing element | Dual-spectrum optical sensor, heat sensor, and CO sensor |
| Activation threshold (heat) | +64°С ±2°С (A1R-classification, EN 54-5) |
| CO detection thresholds | 50 ppm (0.005%) – triggers after 90 minutes 100 ppm (0.01%) – triggers after 40 minutes 300 ppm (0.03%) – triggers after 3 minutes CO alarm resets when levels drop below 40 ppm |
| False alarm filter | HazeFlow 2 Algorithm |
| Built-in siren | 85 dB at 1 meter |
| Interconnected alarms | Yes (via Ajax Hub and fallback direct communication) |
| Primary alarm connection | Via hub (triggers within 20 seconds) |
| Fallback direct connection | If hub connection is lost, devices warn each other within 1 minute |
| Power supply | Battery: Two CR123A, 3V |
| Battery life | Up to 7 years |
| Jeweller radio technology | Communication range: Up to 1,700 m (Line of Sight) Two-way communication between devices Operating frequencies: 868.0-868.6 MHz Self-adjusting RF output power: Up to 20 mW Block encryption based on AES algorithm Detector polling period: 12−300 s |
| Temperature sensor | Available |
| Operating temperature range | 0°C to +65°C |
| Permissible humidity | Up to 80% |
| Protection features | Tamper-resistant Fraud protection Jamming detection |
| Remote configuration and testing | Yes (via Ajax app) |
| Dust and insect protection | Patented dust- and insect-resistant chamber |
| Dimensions | 124 × 124 × 45 mm |
| Weight | 274.5 g |
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Here you can see the compatibility between the various units and Hubs from Ajax
https://ajax.systems/tools/devices-compatibility/
Ajax FireProtect 2 RB - wireless smoke, heat and CO alarm
FireProtect 2 RB is a wireless fire detector that detects smoke, rapid temperature changes and elevated CO levels. When activated, the alarm immediately sends a message to the hub and can then notify you via app, SMS or call.
Reliable smoke detection
The sensor constantly monitors the air and reacts immediately to the development of smoke. It uses an invisible light beam in a detection chamber - when smoke particles enter, the light beam is refracted, triggering the alarm. You avoid false alarms, as the sensor is designed to know the difference between real smoke and everyday elements such as dust and water vapor from, for example, cooking.
Advanced heat detection
In addition to smoke, the alarm also reacts to temperature changes, thus providing early warning, even before smoke is visible. The alarm is automatically activated in two situations:
- At temperatures above 64 °C
- At temperature increases of more than 10 °C per minute
This is particularly important for fires that develop quickly without smoke development in the initial phase - for example electrical fires. The temperature limit follows the A1R classification according to EN 54-5.
Carbon monoxide detection (CO)
FireProtect 2 RB has a built-in CO sensor that detects dangerous levels of carbon monoxide, also known as "the invisible killer".
CO levels are measured continuously and the alarm is activated at the following concentrations:
- 50 ppm (0.005%) – after 90 minutes .
- 100 ppm (0.01%) – after 40 minutes .
- 300 ppm (0.03%) – after 3 minutes .
The alarm remains active until the CO level drops below 40 ppm.
Optical sensor
The FireProtect 2 RB uses a dual-spectrum optical sensor with blue and infrared LEDs to accurately distinguish between smoke and other airborne particles such as water vapor and dust.
The alarm process takes place in three steps:
Detection : The sensor analyzes the size and composition of airborne particles.
Verification: The HazeFlow 2 algorithm analyzes data in real time. Short-term influences such as cooking fumes are ignored to avoid false alarms.
Alarm: If smoke is confirmed, the alarm is activated with an immediate notification.
Minimal maintenance
The smoke alarm has a patented smoke chamber that is resistant to dust and insects and therefore does not require regular cleaning. Regular function testing is recommended, but no other maintenance is necessary.
Interconnected alarming
When one smoke alarm is activated, all connected alarms start simultaneously. The system can be expanded with both outdoor and indoor sirens, so neighbors are also warned in the event of an alarm.
The system has two communication paths:
- Primary hub connection : When activated, the alarm sends a message to the hub, which starts all connected smoke alarms within 20 seconds.
- Backup connection : If the hub connection is interrupted, the alarms communicate directly with each other within 1 minute.
Easy installation
FireProtect 2 RB is installed in three simple steps:
- Scan the QR code in the Ajax app.
- Mount the unit on the ceiling.
- Finish the setup in the app.
Range
The range between the smoke alarm and the hub is up to 1,700 meters in open terrain.
Battery life
The sensor comes with 2 × CR123A batteries with a lifespan of up to 7 years. Battery life is affected by several factors:
- Frequency of use - frequent alarms reduce battery life.
- Ambient temperature - low temperatures can affect battery performance.
- Battery quality - quality batteries generally have a longer lifespan.
Tamper protection
The sensor sends an alarm to the hub when a removal attempt is made.
Dimensions and weight
- Dimensions: 124 × 124 × 45 mm.
- Weight : 274.5 g.
- Available in: White or black.
Compatible Ajax hubs
FireProtect 2 RB is compatible with:
- Hub (OS Malevich 2.15.4 or later).
- Hub Plus (OS Malevich 2.15.4 or later).
- Hub 2.
- Hub 2 Plus.
- ReX 2 signal amplifier.
Technical information
- Wireless range up to 1,700 m in open terrain.
- Works both independently and with Ajax hub - the built-in siren is also activated without a hub connection.
- Built-in CO sensor warns of dangerous carbon monoxide levels (10-year lifespan).
- Secure device authentication against tampering.
- Tamper protection with alarm when attempting to dismantle.
- Two-way communication via Jeweller protocol enables continuous testing and status updates.
- Built-in protection against signal interference with jamming detection and frequency hopping.
- Encrypted radio communication.
- Built-in siren (85 dB) with activation by smoke, heat or carbon monoxide.
- Interconnected alarming - all devices in the system are activated when danger is detected.
- Temperature alarm at 64 °C or rapid temperature increase.
- Battery life up to 7 years (depending on use and environment).
- Quick installation with SmartBracket brackets without disassembly.
- LED indicator and test button for manual function check.
