AJAX FireProtect (Heat/Sounder) Black Wireless Fire Detector with 85 dB Siren

An 85 dB siren at 3 metres makes the AJAX FireProtect (Heat/Sounder) impossible to ignore, while dual heat and smoke detection catches fires early. Engineered to EN 14604 and EN 54-5, this wireless detector reacts to rapid temperature rises and smoke particles, with a sealed chamber that resists dust and insects for dependable long-term operation.

Overview

The FireProtect (Heat/Sounder) is a professional-grade wireless fire detector for indoor use. It combines a smoke sensor and a rate-of-rise heat sensor in one compact unit, providing comprehensive fire detection. The built-in 85 dB sounder alerts occupants immediately, while the device communicates with the Ajax Hub over the proprietary Jeweller radio protocol, ensuring a range of up to 1,300 metres in open space.

What stands out

• Dual detection: smoke and rapid temperature rise (Class A1R per EN 54-5)
• Loud 85 dB siren at 3 metres for immediate alerting
• Long battery life: up to 4 years on two CR2 batteries plus a CR2032 backup
• Advanced Jeweller wireless technology with 1,300 m line-of-sight range
• Tamper protection against casing opening
• Automatic self-testing for continuous reliability
• Dust and insect resistant smoke chamber

Technical details

• Detection type: Smoke and heat (rapid temperature rise)
• Siren volume: 85 dB at 3 m
• Wireless technology: Jeweller (proprietary)
• Communication range: up to 1,300 m line of sight
• Power supply: 2× CR2 batteries (main), 1× CR2032 battery (backup)
• Battery life: up to 4 years
• Operating temperature: 0°С to +65°С
• Operating humidity: up to 80% (non-condensing)
• Installation method: Indoor, surface-mounted
• Color: Black
• Compliance standards: EN 14604, EN 54-5
• Tamper protection: Yes (against opening the casing)
• Connectivity: Requires Ajax Hub for operation
• Self-testing: Yes (automatic and manual)
• Smoke chamber protection: Yes (against dust and insects)
• Frequency band: 868.0 – 868.6 MHz
• Maximum RF power: 20 mW
• Protection class: IP20

Our verdict

The AJAX FireProtect (Heat/Sounder) delivers professional-grade fire detection with dual sensors, a powerful siren, and long battery life. Its robust wireless range and tamper protection make it a reliable choice for comprehensive home or business security.