Fyreye MKII Addressable Combined Smoke & Heat Detector
Summary
The Fyreye MKII-AOH addressable combined smoke and heat detector provides comprehensive fire detection through dual sensing technology. Utilising a pulsing infrared LED and photodiode, the detector identifies smoke through infrared scatter, whilst the integrated Class A1 heat sensor triggers at a fixed temperature of 57°C, providing enhanced protection against both smouldering and fast-developing fires.
This detector is particularly effective at detecting optically dense smoke from materials including soft furnishings, PVC, plastic and foam, which produce small visible particles between 0.5 and 10μm. The combined detection method makes it ideal for environments where both smoke and heat detection are required for optimal fire safety coverage.
Featuring 8 LEDs for improved 360° visibility, the MKII-AOH ensures alarm status can be clearly seen from any angle. The detector is fully compatible with all Fyreye MKII bases and can be locked to the base to prevent unauthorised removal, whilst remote LED output capability allows for external indication where required.
Features
- Combined optical smoke and Class A1 heat detection for comprehensive fire protection
- Designed to meet EN54 parts 5 & 7 requirements with LPCB approval
- Pulsing infrared LED and photodiode technology for reliable smoke detection
- Fixed heat trigger at 57°C for rapid response to fast-developing fires
- 8 LEDs providing improved 360° visibility of alarm status
- Lockable to base to stop unauthorised removal
- Remote LED output capability for external indication
- Compatible with all Fyreye MKII bases
- Addressed with dip switches or hand-held programmer
- IP43 rated for protection against dust and water spray
- Wide operating temperature range from -10°C to +50°C
- 100m² coverage area per detector
- Low quiescent current of 500µA for efficient operation
- 10 second start-up time for rapid system initialisation
FAQ
What is the difference between MKII-AOH and MKII-AOH/B?
The MKII-AOH/B includes a detector base, whilst the MKII-AOH is supplied without a base. Both detectors offer identical performance and functionality.
What types of fires is the MKII-AOH most suitable for detecting?
The MKII-AOH is particularly effective at detecting optically dense smoke from materials such as soft furnishings, PVC, plastic and foam. The combined heat detection at 57°C also provides protection against fast-developing fires, making it suitable for a wide range of fire scenarios.
Can the MKII-AOH be used in areas with high humidity?
Yes, the detector can operate in environments with up to 95% relative humidity (non-condensing), making it suitable for most indoor applications.
How is the detector addressed on the fire alarm system?
The MKII-AOH can be addressed using either dip switches located on the detector or via a hand-held programmer, providing flexible installation and commissioning options.
What is the coverage area for each detector?
Each MKII-AOH detector provides coverage for up to 100m², though actual spacing should be determined in accordance with BS 5839-1 and specific site requirements.
Is the detector compatible with other Fyreye bases?
Yes, the MKII-AOH is compatible with all Fyreye MKII addressable detector bases, providing flexibility for different installation requirements.
What operating voltage does the detector require?
The MKII-AOH operates on 17 to 28V DC, which is standard for addressable fire alarm systems.
Can I add a remote LED indicator to the detector?
Yes, the detector features a remote LED output providing 5mA at 24VDC, allowing connection of an external LED indicator for improved visibility in areas where the detector may not be easily visible.
Specifications
- Detector Class: Combined Smoke & Heat A1
- Design Standard: EN54 parts 5 & 7
- Approval: LPCB
- Operating Voltage: 17 to 28V DC
- Quiescent Current: 500µA
- Alarm Current @ 24V DC: 5mA
- Operating Temperature: -10 to +50°C
- Minimum Continuous Temperature: 0°C
- Maximum Humidity: 95% RH non-condensing
- Alarm Condition: 0.09dB/m to 0.12dB/m (smoke), Fixed heat trigger @ 57°C
- Coverage: 100m²
- IP Rating: IP43
- Start-up Time: 10 seconds
- Size (With Base): 100 x 59mm
- Weight (With Base): 75g (133g)
- Remote Output: 5mA at 24VDC
Downloads
- Datasheet (Adobe PDF)
- Brochure (Above PDF)
- Installation Manual (Adobe PDF)
