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Fyreye MKII Addressable Rate of Rise Heat Detector


SKU: 4bda8a81e49d Category: Brand:


The Fyreye MkII Rate of Rise heat detector (MKII-AHR) uses a thermistor arrangement to sense a quick rise in temperature and also a final threshold temperature of 57°C. The Fyreye fixed heat detector (MKII-AHF) has a single thermistor arrangement that gives an alarm at a temperature of 90°C.


  • Designed to meet EN54 requirement
  • Lockable to base to stop unauthorised removal
  • Remote LED output
  • 8 LEDs for improved, 360° visibility
  • Compatible with all Fyreye MkII bases
  • Addressed with dip switches or hand-held programmer


  • Detector Class: Rate of Rise & Fixed Heat Detector A1R
  • Design Standard: EN54 part 5
  • Approval: LPCB
  • Operating Voltage: 17 to 28V DC
  • Quiescent Current: 500μA
  • Alarm Current @ 24V DC: 5mA
  • Operating Temperature: -10°C to +50°C
  • Minimum Continuous Temperature: 0°C
  • Maximum Humidity: 95% RH non-condensing
  • Alarm Condition: Rate of rise or fixed heat trigger @ 57°C
  • Coverage: 50m²
  • IP Rating: IP43
  • Start-up Time: 10 Seconds
  • Size (with Base): 100 x 48 mm
  • Weight (with Base): 75g (133g)
  • Remote Output: 20mA at 24VDC


Additional information

Weight 0.25 kg

White, Black



Detection Type

Device Type

Hazardous Applications

Marine Applications


System Type

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