52254.149.WH1 # 52254 | Ajax FireProtect 2 RB Heat/Smoke Jeweller white is an advanced wireless fire detector designed for reliable protection of residential and professional premises, thanks to the intelligent combination of smoke and heat sensors. It integrates a dual-spectrum optical sensor with HazeFlow 2 algorithm and dual A1R certified thermistors capable of detecting rapid temperature increases or critical thresholds above 64 °C. Jeweller radio communication up to 1700 m , automatic alarm interconnection , built-in 85 dB siren and continuous diagnostics with in-app notifications ensure maximum safety and control. The compact and elegant black design, quick installation with SmartBracket and power supply with replaceable batteries for up to 7 years make it a modern, efficient solution that complies with Ajax European standards.
TOTALER AUSVERKAUF ×
CLEARANCE SALE!
Take advantage of our must-see outing offers.
Discover the promo >>
52254.149.WH1 | WIRELESS HEAT AND SMOKE DETECTOR WITH SEALED BATTERIES

The Ajax FireProtect 2 SB (Heat/Smoke) Jeweler, 52254.149.WH1, white, is an advanced wireless fire detector designed to provide reliable, continuous protection for residential and commercial premises. Thanks to its combination of intelligent sensors and long-range radio communication, the device ensures rapid and accurate fire detection, reducing false alarms and providing immediate notifications. The elegant black design easily integrates into any environment, while automatic self-diagnosis, interconnected alarms, and a long-lasting sealed battery ensure maximum safety, easy installation, and minimal maintenance.
Main specifications:
- Dual-spectrum optical smoke sensor with HazeFlow 2 algorithm
- High-precision heat sensors for detecting dangerous temperatures
- Jeweller radio communication with a range of up to 1700 m
- Interconnected fire alarms with integrated 85 dB siren
- Sealed lithium battery with up to 10 years of battery life
- Continuous self-diagnosis and quick SmartBracket installation
Further details
Technical data sheet
| 52254.149.WH1 | |
| Communication | |
| Jeweler communication technology | Proprietary wireless communication technology to transmit commands, alarms, and events. Key features:
|
| Radio frequency bands | 866.0 - 866.5 MHz 868.0 - 868.6 MHz 868.7 - 869.2 MHz 905.0 - 926.5 MHz 915.85 - 926.5 MHz 921.0 - 922.0 MHz Depence on the sales reaction |
| Maximum effective radiated power (ERP) | up to 20 mW Automatic power control to reduce power consumption and radio interference. |
| Radio signal modulation | GFSK |
| Radio signal range | Up to 1,700 m up to 5,500 ft Between the detector and a hub (or radio signal range extender) in an open space. |
| Encrypted radio communication | All the data stored and transmitted are protected by block encryption featuring a dynamic key. |
| Frequency hopping | To prevent radio interference and jamming |
| Sensitive elements | smoke sensor CO (carbon monoxide) sensor |
| Smoke detection | |
| Sensitive element | double-spectrum optical sensor Recognizes smoke by the size of particles in the air |
| False alarm prevention | Does not react to water vapor. |
| Patented smoke chamber | Protects the smoke sensor from dust, dirt, and insects |
| Dangerous temperature detection | |
| Sensitive element | according to the requirements for Class A1R heat detectors Requirements of EN 54-5 and BS 5446-2 standards |
| High temperature alarm | at temperatures above 64 °C at temperatures above 147 °F |
| Temperature spike alarm | when the temperature rises more than 10°C 50°F in 1 minute or less |
| Additional features | |
| Built-in siren | 85 dB volume at a distance of 3 meters 85 dB volume at a distance of 9 ft Sound notification of alarms. Active until the reason for triggering is eliminated or until the user disables the notification. |
| Interconnected fire detectors alarm | via primary interconnection If one of the fire detectors in the system detects a threat, it sends an alarm to the hub. Within 20 seconds, the hub initiates an interconnected alarm and sends data to Ajax apps. via fallback interconnection1 At the same time with notifying the hub, the initiating detector sends an alarm directly to other detectors. All connected detectors activate the buzzer within a minute. It will work even in the worst-case scenario of losing connection with the hub. 1 Fallback interconnected alarm is available only for FireProtect 2 detectors with firmware version 5.59.2.ХХ or later. Devices that support the fallback interconnected alarm are marked on the package with a “Fallback interconnect supported” label. |
| LED indication | green is a power indication A LED indicator on the device enclosure lights up once every 56 seconds. The indication meets the requirements of EN 50291 yellow is an indication of malfunctions A LED indicator on the device enclosure lights up when malfunctions are detected. For example, in the case of discharged batteries, contamination of the smoke chamber, or end of the service life red is an indication of fire alarms A LED indicator on the device enclosure lights up when the detector registers a fire alarm |
| Button on the front panel of the detector | In normal mode, when pressed, it starts the smoke chamber test. In the event of an alarm or malfunction, pressing turns off the detector sound notification. |
| Recommendations | The device is designed only for indoor installation SmartBracket mounting panel allows adjusting the position of the detector after installation. |
| Sabotage protection | |
| Tampering alarm | Alerts of attempts to detach the detector from the surface or remove the mounting panel. |
| Protection against spoofing | device authentication |
| Detection of communication failure | within 15 minutes The time to detect communication loss depends on the settings for the number of undelivered data packages (specified in the Jeweler or Jeweller/Fibra settings). The polling interval is fixed at 300 seconds. |
| Power supply | |
| For FireProtect 2 SB (Heat/Smoke/CO) | 2 × CR123A batteries Up to 7 years of battery life. |
| Enclosure | |
| Color | White |
| Dimension | 124 × 124 × 45 mm 4.88″ × 4.88″ × 1.77″ |
| Weight | 272 g 9.59 oz |
| Operating temperature range | from 0 °C to +50 °C from 32°F to 122°F |
| Operating humidity | up to 80% |
| Protection class | IP20 |
| Complete set | FireProtect 2 SB (Heat/Smoke) Jeweller SmartBracket mounting panel Installation kit 2 × CR123A battery (pre-installed) Quick start guide |
| Warranty | 24 months |



