Spectrex SharpEye 40/40L4 & 40/40L4B UV/IR Flame Detector

Code: 40/40L4 & 40/40L4B
  • UV-IR
  • Response time typically 5 seconds
  • Field of View Horizontal 100º; Vertical 95º

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Spectrex SharpEye 40/40L4 and 40/40L4B (with Built-in-test option) UV/IR Flame Detector

Features a combination of UV and IR sensors, where the IR sensor operates at a wavelength of 4.5 µm and can detect hydrocarbon-based fuel and gas fires.

The UV/IR flame detector senses radiant energy in the short wave section of both the ultraviolet and infrared portions of the electromagnetic spectrum. The signals from both sensors are analysed for frequency, intensity and duration. Simultaneous detection of radiant energy in both the UV and IR sensors triggers an alarm signal. The UV sensor incorporates a special logic circuit that helps prevent false alarms caused by solar radiation.

Due to increased reliability, the 40/40 Series warranty period has been extended to 5 years.


  • UV/IR Dual-Sensor
  • Solar Blind
  • Aluminium or Stainless Steel housing
  • Automatic Built-In-Test (BIT) and Manual- to assure continued reliable operation (in 40/40L4B only)
  • Heated window – for operation in harsh weather conditions (snow, ice, condensation)
  • Multiple output options for maximum flexibility and compatibility
    • Relays (3) for Alarm, Fault and Auxiliary
    • 0-20mA (stepped)
    • HART Protocol for maintenance and asset management
    • RS-485, Modbus Compatible
  • High Reliability – MTBF – minimum 150,000 hours
  • Approved to Safety Integrity Level 2 (SIL2 – TUV) – Model 40/40L4B only
  • User Programmable via HART or RS-485
  • Hazardous area zones:
    • Zones 1 & 2 with IIC gas group vapours present
    • Zones 21 & 22 with IIIC dust type present
  • Ex approved to:
    • ATEX & IECEx
    • FM/FMC/CSA
    • TR CU (EAC)
  • 3rd party performance approved
    • EN54-10 (VdS)
    • FM3260
  • Marine Approval
    • MED “Wheelmark” approval (DNV)
  • Reliability
    • IEC61508


40/40L4 UV/IR (4.5μm without BIT) – aluminium
40/40L4B UV/IR (4.5μm with BIT) – aluminium


40/40-001 Tilt, 777090, Stainless steel
777670 40/40 Duct Mount, Stainless steel
777163 40/40 Weather Cover, Stainless steel
777166 40/40 Cone Viewer ( laser aimers (2x) not included)
777263 40/40 Weather Cover, ABS Plastic
777563 40/40 FOV field of view limiter, stainless steel
777650 40/40 Air Shield, Stainless steel
789260-1 Pole Mount(U-BOLT) – 3″, Stainless steel
789260-2 Pole Mount(U-BOLT) – 2″, Stainless steel
789260-3 Pole Mount (U-BOLT) – 4″, Stainless steel
794079 USB/RS485 Converter Kit
888810 HART Hand Held Diagnostics Unit (ATEX IS)


  • Offshore/Onshore Oil & Gas installations and pipelines
  • Chemical plants
  • Petrochemicals plants
  • Storage Tank farms
  • Aircraft hangars
  • Power Generation facilities
  • Pharmaceutical Industry
  • Printing Industry
  • Warehouses
  • Automotive
  • Waste Disposal facilities
  • Aerospace Industry
  • Paint, Polymer and Glue processes

Improved performance over the standard 40/40L model. Not suitable for hydrogen fires.

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Title Size
40-40 L4-L4B Datasheet 569 KB

Additional information

Weight 0.09 kg