Ajax FireProtect 2 RB White – Wireless Fire Detector with Smoke, Heat and Carbon Monoxide Sensor Jeweller
52252.137.WH1 # 52252 | Ajax FireProtect 2 RB (Heat/Smoke/CO) Jeweller white is an advanced wireless fire detector designed for comprehensive and reliable protection of residential and professional premises. It integrates a dual-spectrum optical smoke sensor , high-precision heat sensors and a chemical carbon monoxide sensor with a lifespan of up to 10 years , ensuring fast and accurate detection. Long-range Jeweller communication up to 1700 m , intelligent interconnected alarms and a built-in 85 dB siren ensure an immediate response to danger. The modern black design, continuous self-diagnosis , quick SmartBracket installation and power supply with long-lasting replaceable batteries make the device ideal for advanced security systems. Ajax
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52252.137.WH1 | WIRELESS HEAT, SMOKE, AND CO DETECTOR WITH REPLACEABLE BATTERIES

The Ajax FireProtect 2 RB (Heat/Smoke/CO) Jeweller, 52252.137.WH1, white, is a next-generation wireless fire detector designed to provide comprehensive, intelligent protection against fires and carbon monoxide leaks in residential and commercial environments. Thanks to a combination of advanced sensors and long-range Jeweller radio communication, the device ensures rapid detection, reduced false alarms, and immediate notifications. The elegant black design blends seamlessly into any environment, while continuous self-diagnosis, interconnected alarms, and a built-in siren ensure a high level of safety and long-term reliability, with simple installation and minimal maintenance.
Main specifications:
- Dual-spectrum optical smoke sensor with anti-false alarm algorithm
- High-precision heat sensors with intelligent thresholds
- Chemical carbon monoxide sensor with a lifespan of up to 10 years
- Jeweller radio communication with a range of up to 1700 m
- Interconnected fire alarms and integrated 85 dB siren
- Long-life replaceable batteries and continuous self-diagnosis system
Further details
Technical data sheet
| 52252.137.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 heat 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 |
| Carbon monoxide (CO) detection | |
| Sensitive element | chemical CO sensor |
| Alarm if accumulated dose of CO is exceeded | more than 50 ppm (0.005%) — no more than in 90 minutes more than 100 ppm (0.01%) — no more than in 40 minutes more than 300 ppm (0.03%) — no more than in 3 minutes CO concentration of 400 ppm (0.04%) within 3 hours can be life-threatening. The detector stops notifying about the dangerous level of carbon monoxide when the concentration drops to 50 ppm (0.005%) within one minute. |
| Sensor life | 10 years After 10 years of operation, the detector must be replaced with a new one. |
| 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 RB (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 RB (Heat/Smoke) Jeweller SmartBracket mounting panel Installation kit 2 × CR123A battery (pre-installed) Quick start guide |
| Warranty | 24 months |



