Ajax FireProtect 2 RB Fire Alarm - Heat and Smoke
Wireless smoke alarm that reacts to smoke and heat.
- Alarms when smoke develops or temperature rises rapidly.
- Works both independently and with a hub.
- Built-in 85 dB siren.
- Can be operated via 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 and heat 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 |
| Activation threshold (heat) | +58°С (UL 521 standard) |
| 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 5 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 +38°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 | 272 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 and heat alarm
FireProtect 2 RB is a wireless fire detector that detects smoke and rapid temperature changes. 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. The sensor is designed to distinguish between real smoke and other elements such as dust and water vapor.
Intelligent heat detection
In addition to smoke, the sensor also responds to temperature changes, providing early warning even when smoke is not visible. The alarm is automatically activated by both sudden temperature increases and temperatures above 58°C.
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.
Analysis : The sensor examines the size and composition of airborne particles.
Verification : FireProtect 2 RB checks data in real time via the HazeFlow 2 algorithm. Short-lived particles, such as cooking fumes, are ignored to avoid false alarms.
Alarm : If smoke is confirmed, the alarm is activated with an immediate message.
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 easily installed in three steps: Scan the QR code in the Ajax app, mount the device on the ceiling and complete the setup directly 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 5 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: 272g
- 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 (Line of Sight).
- Works both independently and with Ajax hub - the built-in siren is also activated without a hub connection.
- Secure device authentication against tampering.
- Tamper protection with alarm in case of attempted dismantling or manipulation.
- Two-way communication with hub 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 or heat.
- Temperature alarm at 58 °C or rapid temperature increase.
- Battery life up to 5 years (depending on use and environment).
- Quick installation with SmartBracket brackets without disassembly.
- LED indicator and test button for manual function check.
