Product Description
The AJAX#52543 Ajax FireProtect 2 SB (Heat/Smoke) Jeweller White/Black is a professional wireless heat and smoke detector designed to provide reliable early fire detection for residential, commercial, and industrial environments. Featuring Ajax Jeweller encrypted wireless communication, a double-spectrum optical smoke sensor, advanced heat detection technology, interconnected fire alarm functionality, and sealed batteries with up to 10 years of operation, the FireProtect 2 SB delivers comprehensive fire safety protection with minimal maintenance. Designed to meet modern fire safety requirements, this detector offers fast response to smoke and temperature changes while minimising false alarms caused by steam, dust, and environmental factors.
What's Included in the Box

Main Features
Combined Smoke and Heat Detection
The AJAX#52543 combines two critical fire detection technologies:
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Smoke Detection
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Heat Detection
Providing faster and more reliable fire identification across various fire types.
Double-Spectrum Optical Smoke Sensor
The detector uses an advanced optical sensor capable of recognising smoke particles based on size and density.
Benefits include:
Resistant to False Alarms
The patented smoke chamber is engineered to:
Providing dependable fire detection in everyday environments.
Advanced Heat Detection
Built to comply with Class A1R heat detector requirements.
The detector activates when:
Providing additional protection where smoke may not be immediately present.
Jeweller Wireless Communication
Ajax Jeweller technology delivers:
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Two-way encrypted communication
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Instant alarm transmission
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Remote diagnostics
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Frequency hopping protection
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Device authentication
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Remote configuration
Wireless communication range:
Under open-space conditions.
Built-In 85 dB Siren
The integrated siren provides:
Ensuring occupants receive immediate warning of potential fire hazards.
Interconnected Fire Alarm Functionality
The AJAX#52543 supports:
If one FireProtect 2 detector activates:
Providing building-wide notification for faster evacuation.
Intelligent LED Status Indication
The detector provides clear visual status information through dedicated LED indicators.
Green LED
Yellow LED
Red LED
Front Panel Test & Silence Button
The front-mounted button allows:
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Smoke chamber testing
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Alarm muting
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Fault acknowledgement
For easy system maintenance and operation.
Advanced Anti-Sabotage Protection
Security features include:
Providing reliable protection against unauthorised interference.
Sealed Battery Technology
The AJAX#52543 is powered by:
Providing:
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Up to 10 years battery life
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Maintenance-free operation
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Reduced servicing requirements
SKU
AJAX#52543
Detailed Specifications
| Specification |
Details |
| Product Code |
AJAX#52543 |
| Product Name |
FireProtect 2 SB (Heat/Smoke) Jeweller |
| Device Type |
Wireless Heat & Smoke Detector |
| Communication Technology |
Jeweller |
| Wireless Range |
Up to 1,700 m |
| Smoke Sensor Type |
Double-Spectrum Optical Sensor |
| Heat Detection Standard |
Class A1R |
| High Temperature Alarm |
Above 64°C |
| Temperature Rise Alarm |
More than 10°C per Minute |
| Built-In Siren |
Yes |
| Siren Volume |
85 dB at 3 m |
| Interconnected Fire Alarms |
Yes |
| Fallback Interconnection |
Yes |
| LED Status Indicators |
Green, Yellow, Red |
| Tamper Alarm |
Yes |
| Device Authentication |
Yes |
| Communication Failure Detection |
Within 15 Minutes |
| Power Supply |
2 Sealed Lithium Batteries |
| Battery Life |
Up to 10 Years |
| Operating Temperature |
0°C to +50°C |
| Operating Humidity |
Up to 80% |
| Protection Rating |
IP20 |
| Dimensions |
124 × 124 × 45 mm |
| Weight |
268.5 g |
| Installation Environment |
Indoor |
| Available Colours |
White, Black |
| Warranty |
24 Months |
Warranty Information
24-Month Manufacturer Warranty
The Ajax FireProtect 2 SB (Heat/Smoke) Jeweller is covered by a full 24-month manufacturer warranty.
About Ajax Systems
Ajax Systems is a globally recognised manufacturer of professional-grade security and life safety technologies. Ajax fire detection solutions are trusted worldwide for their advanced sensor technology, encrypted communication systems, intuitive management platforms, and exceptional reliability.

Practical Use Scenarios
Residential Fire Protection
Ideal for:
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Homes
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Apartments
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Townhouses
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Multi-storey residences
Providing reliable smoke and heat detection.
Commercial Fire Safety
Suitable for:
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Offices
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Retail stores
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Medical facilities
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Hospitality venues
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Educational institutions
Offering professional-grade fire detection and notification.
Multi-Room Fire Detection Systems
Perfect for:
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Large homes
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Commercial buildings
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Warehouses
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Multi-zone facilities
Where interconnected alarms improve occupant safety.
Long-Term Maintenance-Free Installations
The sealed battery design makes the AJAX#52543 ideal for:
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Rental properties
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Holiday homes
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Remote sites
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Commercial facilities
Reducing ongoing maintenance requirements.
Datasheets & Resources
Available resources include:
Excellence for the Australian and New Zealand Market
The AJAX#52543 Ajax FireProtect 2 SB (Heat/Smoke) Jeweller White/Black has been engineered to meet the fire safety requirements of homes and businesses throughout Australia and New Zealand. Combining advanced smoke detection, heat monitoring, encrypted wireless communication, and maintenance-free operation, it delivers dependable fire protection for a wide range of applications.
Key benefits include:
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Genuine Ajax Systems product
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Smoke and heat detection
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Double-spectrum optical smoke sensor
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Class A1R heat detection
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High-temperature alarm
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Temperature rise alarm
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Built-in 85 dB siren
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Jeweller encrypted wireless communication
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Up to 1,700m communication range
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Interconnected fire alarm functionality
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Fallback alarm capability
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Device authentication
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Tamper protection
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Up to 10 years battery life
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Maintenance-free sealed batteries
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Professional-grade reliability
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Available in White and Black
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24-month manufacturer warranty
FAQs
What is AJAX#52543 used for?
The AJAX#52543 is a wireless detector designed to detect smoke and dangerous heat increases associated with fire.
Does AJAX#52543 detect carbon monoxide?
No. The AJAX#52543 provides smoke and heat detection only. For CO detection, consider the AJAX#52362 FireProtect 2 SB (Heat/Smoke/CO).
What communication technology does AJAX#52543 use?
The AJAX#52543 uses Ajax Jeweller encrypted wireless communication technology.
What is the wireless range of AJAX#52543?
The AJAX#52543 supports wireless communication distances of up to 1,700 metres in open-space conditions.
How long do the batteries last in AJAX#52543?
The AJAX#52543 features sealed lithium batteries designed to provide up to 10 years of operation.
Does AJAX#52543 include a built-in siren?
Yes. The AJAX#52543 includes an integrated 85 dB siren for immediate local fire alerts.
Can AJAX#52543 activate other FireProtect detectors?
Yes. The AJAX#52543 supports interconnected alarm functionality and can activate compatible FireProtect 2 detectors.
Is AJAX#52543 suitable for commercial installations?
Yes. The AJAX#52543 is suitable for offices, retail stores, hospitality venues, medical facilities, and other commercial environments.
What colours are available for AJAX#52543?
The AJAX#52543 is available in White and Black.
Does AJAX#52543 include a warranty?
Yes. The AJAX#52543 is covered by a 24-month manufacturer warranty.