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Fyreye MKII Conventional Fyreye Fixed Heat (CS) Detector



The Fyreye MkII optical smoke detectors use a pulsing IR LED & photodiode to detect IR scatter caused by smoke entering the chamber. The detector is particularly suitable for detecting optically dense smoke, involving materials such as soft furnishings, PVC, plastic, foam and all similar materials which produce small visible particles (0.5 to 10μm)..

The Fyreye fixed heat detector MKII-HF/CS90 gives an alarm above 86°C.


  • Designed to meet EN54 requirement
  • Lockable to base to stop unauthorised removal
  • Remote LED output
  • Compatible with all Fyreye MkII bases


  • Model: MKII-HF/CS90
  • Detector Class: Fixed Heat Only CS
  • 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: Fixed heat trigger @90°C
  • Coverage: 50m²
  • IP Rating: IP43
  • Start-up Time: 10 Seconds
  • Size (with Base): 100 x 48 mm
  • Weight (with Base): 75g (133g)


Additional information

Weight 1 kg

White, Black



Detection Type

Device Type


Hazardous Applications

Marine Applications

System Type

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