Ajax FireProtect 2 RB/HS wireless smoke and heat detector Jeweller with replaceable batteries 2×CR123A up to ~7 years battery life 85 dB siren up to 1700 m radio range for indoor installation white

Ajax FireProtect 2 RB/HS Jeweller (52250) is a wireless indoor smoke and heat detector with replaceable batteries and a built-in 85 dB siren, designed for fast detection of fire and dangerous temperature rise in residential and office spaces. It uses the secure two-way Jeweller wireless protocol with up to ~1700 m radio range, ensuring reliable alarm transmission to the hub.

Key Advantages

• Dual-spectrum optical smoke sensor → distinguishes real smoke from steam and reduces false alarms

• Temperature sensors (thermistors) → detects rapid temperature rise to enhance fire safety

• Replaceable batteries (2 × CR123A) → long operating time up to ~7 years with low-battery notifications

• Built-in 85 dB siren → loud local alarm signal indoors

• Jeweller two-way wireless protocol → secure alarm and status transmission with minimal latency

• Wide radio range up to ~1700 m → stable communication with the hub in open space

• LED indication → clear visual status and alarm indication

• Easy installation with SmartBracket → quick and secure ceiling or wall mounting

Technical Specifications

• Type → wireless smoke and heat detector

• Model/Code → FireProtect 2 RB/HS Jeweller (52250)

• Sensors → dual-spectrum optical smoke sensor, two thermistors for temperature detection

• Alarm sound → 85 dB at ~3 m (piezo siren)

• Power supply → 2 × CR123A 3 V batteries (replaceable)

• Battery life → up to ~7 years

• Wireless protocol → Jeweller two-way RF communication

• Radio range → up to ~1700 m in open space

• Protection rating → IP20 (indoor use)

• Operating temperature → 0 °C to +50 °C

• Dimensions → ~123.7 × 123.7 × 44.7 mm

• Weight → ~0.27 kg

• Color → white

Compatibility

• Compatible with Ajax Hub, Hub 2, Hub 2 Plus and Hub Hybrid — full alarm transmission and remote monitoring

• Not intended for outdoor use (not water-resistant)

How to Use

• Install the detector on the ceiling or wall using the SmartBracket mount

• Add the device to the Ajax system via the mobile app

• Test the sensors using the Test function in the app

• Periodically check battery status and alarm history in the app

Why Choose This Product
Ajax FireProtect 2 RB/HS Jeweller combines smoke and heat detection in one device with a built-in siren, reducing false alarms and providing fast alerts locally and via the mobile app. Long battery life and stable Jeweller wireless communication make it a practical solution for homes and offices.

Real-World Usage Scenarios

• Living room or bedroom — early warning of smoke or high temperature

• Kitchen — additional fire safety near the stove or oven

• Hallway or corridor — protection of evacuation routes

• Office spaces — fast alarm delivery to owner or security service

• Children’s rooms — added safety during nighttime

Package Contents

• Ajax FireProtect 2 RB/HS Jeweller (52250) detector

• SmartBracket mounting plate

• 2 × CR123A batteries (pre-installed)

• Mounting accessories and user manual

About the Brand
Ajax Systems is a leading wireless security systems manufacturer combining innovative sensor technologies, the secure Jeweller protocol and a mobile app to deliver fast alarm notifications and reliable protection for homes and businesses.