Ajax FireProtect 2 RB Heat/Smoke White
Ajax FireProtect 2 RB Heat/Smoke White – wireless fire detector with smoke and heat sensors
Ajax FireProtect 2 RB (Heat/Smoke) Jeweller is a wireless fire detector that combines a dual-spectrum optical smoke detector and a heat sensor in one device. The smoke detector analyses particle sizes in two spectra to distinguish fire smoke from steam and dust, reducing the risk of false alarms.
The heat sensor is class A1R according to EN 54-5 and BS 5446-2. The detector is certified to EN 14604:2005/AC:2008, has a built-in 85 dB siren measured at a distance of 3 metres and is powered by two replaceable CR123A batteries with an estimated life of up to 7 years. RB stands for replaceable battery.
Benefits
- Dual-spectrum optical smoke detector that identifies particle size
- Class A1R heat sensor according to EN 54-5 and BS 5446-2
- Built-in siren providing 85 dB at a distance of 3 metres
- Interconnected alarms: all fire detectors in the system can sound simultaneously
- Estimated battery life up to 7 years from two replaceable CR123A batteries
- Certified to EN 14604:2005/AC:2008
Dual detection for increased safety
FireProtect 2 monitors both smoke and changes in temperature to detect different types of fire.
The detector reacts to:
- Smoke in the detector chamber, analysed in two spectra
- Rapid temperature increases
- High ambient temperature
Combining several detection methods improves the ability to detect a fire at an early stage.
Heat detection
In addition to detecting smoke, FireProtect 2 monitors the temperature in the room.
An alarm is triggered by:
- A temperature above +64 °C
- A temperature increase of more than 10 °C within one minute
This means the detector can also react to fires generating heat before visible smoke reaches the smoke chamber.
Powerful built-in siren
During a fire alarm, the built-in siren sounds while the LED indicator flashes clearly.
Performance:
- Siren level of 85 dB at a distance of 3 metres
- Clear visual alarm indication
This helps ensure that the alarm is noticed quickly, even in larger homes and premises.
Interconnected fire alarms
FireProtect 2 can be configured so that all fire detectors in the installation activate their sirens simultaneously.
Interconnection operates in two ways:
- Primarily through the hub, which activates all fire-detector sirens within approximately 20 seconds
- As a backup, directly between detectors if communication with the hub fails, sounding the entire system within approximately one minute
This means that the entire property is warned simultaneously, allowing faster evacuation in larger buildings.
Also works without a hub
FireProtect 2 can be used both as part of an Ajax security system and as a standalone device.
In standalone operation:
- The detector warns using its built-in siren and LED indication
- No notification is sent to the mobile app, Ajax Translator or PRO Desktop
Standalone operation therefore provides local fire warning, but an Ajax hub is required for app notifications and alarm receiving centre transmission.
Automatic self-testing and monitoring
The detector performs regular self-tests to verify that its functions are working correctly.
The system monitors:
- Sensor operation
- Battery status
- Whether the smoke chamber needs cleaning
- Communication status
Any faults or maintenance requirements are reported to the user in the Ajax app.
Long range and secure communication
Ajax Jeweller technology provides stable, encrypted communication with the hub.
This provides:
- Range up to 1,700 metres in open space
- Encrypted two-way communication using block encryption and a dynamic key
- Frequency hopping to protect against interference and jamming
- Fast transmission of alarms and status information
Up to seven years of battery life
FireProtect 2 RB is designed for long-term operation with minimal maintenance.
This provides:
- Estimated battery life up to 7 years
- Two replaceable CR123A batteries, unlike the SB version with a sealed battery
- Automatic battery monitoring in the Ajax app
Important to know
- The detector is intended for indoor use. Its enclosure rating is IP20, operating range is 0 °C to +50 °C and permitted humidity is up to 80%.
- Connection to an Ajax system requires a hub or range extender running OS Malevich 2.19 or later. Check current compatibility using the Ajax compatibility tool before ordering.
- The Heat/Smoke version does not contain a carbon-monoxide sensor. Choose the Heat/Smoke/CO version when CO detection is required.
- The RB version has replaceable batteries. The SB version has a sealed, non-replaceable battery.
Technical specifications
| Product type | Wireless fire detector with smoke and heat sensors |
| Brand | Ajax Systems |
| Model / item number | FireProtect 2 RB (Heat/Smoke) Jeweller / 52250.136.WH1 |
| Colour | White |
| Smoke sensor | Dual-spectrum optical sensor that identifies particle size |
| Heat sensor | Class A1R according to EN 54-5 and BS 5446-2 |
| Heat alarm threshold | Temperature above +64 °C or an increase of more than 10 °C within 1 minute |
| Built-in siren | Yes, 85 dB at 3 m |
| LED indication | Yes |
| Interconnected alarms | Yes, through the hub (approximately 20 s) or directly between detectors (within approximately 1 minute) |
| Standalone operation | Yes, with siren and LED but without app notifications |
| Radio protocol | Jeweller, GFSK, ERP up to 20 mW |
| Radio range | Up to 1,700 m in open space |
| Battery type | 2 × CR123A, replaceable |
| Battery life | Estimated up to 7 years |
| Dimensions | 124 × 124 × 45 mm |
| Weight | 272 g |
| Operating temperature | 0 °C to +50 °C |
| Humidity | Up to 80% |
| Enclosure rating | IP20 |
| Certifications and standards | EN 14604:2005/AC:2008, EN 300 220-1, EN 300 220-2, EN 301 489-1, EN 301 489-3, EN 62479:2010, EN 62368-1, EN IEC 63000:2018 |
| System requirement | Ajax hub or range extender with OS Malevich 2.19 or later |
| Warranty | 24 months |
Complete the system with
- Ajax Hub 2 Plus—hub for app notifications and transmission to an alarm receiving centre
- Additional Ajax FireProtect 2 detectors—for interconnected fire alarms throughout the property
- Ajax LeaksProtect Jeweller—water detector that complements the fire protection with leak detection
- Spare CR123A batteries for future replacement
- Ceiling installation and commissioning by PC & HiFi Örebro
Why choose Ajax FireProtect 2 RB Heat/Smoke
- Two independent detection principles—dual-spectrum optical smoke detection and a class A1R heat sensor—provide early and reliable fire detection
- Interconnected alarms continue to work if communication with the hub fails
- Replaceable CR123A batteries with an estimated life of up to 7 years, unlike detectors with sealed batteries
- Certified to EN 14604 and can also operate as a standalone local fire alarm
PC & HiFi Örebro recommends
We recommend FireProtect 2 RB (Heat/Smoke) for homes, offices and premises where the fire detectors should use the same app and alarm transmission as the intruder alarm. Its main strength is the combination of dual-spectrum optics and a heat sensor, providing early warning with a low risk of false alarms. Choose the Heat/Smoke/CO version when carbon-monoxide monitoring is also required, for example near a gas cooker, pellet stove or wood-burning stove. Also check that your hub is running OS Malevich 2.19 or later; otherwise it must be updated first.