MSA FL500 UV/IR Vlam Detector

MSA FL500-H2 UV/IR Flame Detector for hydrogen applications


The FL500-H2 is an Ultraviolet / Infrared flame detector specially designed to detect hydrogen (H2) fires.



The FL500-H2 optical flame detector monitors for radiation emitted by a hydrogen flame in both the ultraviolet (UV) and infrared (IR) spectral ranges. This combination of UV/IR provides a fast response time and increased false alarm immunity to radiation sources for reliable protection. 

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  • Proven technology. UV / IR flame detection uses an ultraviolet and an infrared detector to monitor for hydrogen flames, increasing false alarm immunity by measuring two different flame spectra
  • Wide field of view. The 130° field of view covers a greater distance
  • Self-Check for safety integrity. Continuous Optical Path Monitoring (COPM) performs a self-check every two minutes to ensure the optical path is clear and the electronic circuitry is functional.
  • Test anytime, anywhere. Test easily with our exclusive TL105 test lamp, allowing the FL500 UV/IR flame detector to be safely tested in real fire conditions with simulated flame flicker.
  • Resistant to extremes. The wide operating temperature range (-55°C to +85°C) allows use in extreme environments
  • Status at a glance. Three LED status indicators for warning, alarm and normal operation.
  • Robust housing. 316 stainless steel housing to withstand the toughest environments.
  • Multiple output options. Industry standard 4-20 mA (source or sink analog), Modbus, HART, relays

More Information

More Information
Wavelengths 185 to 260 nm (UV), 4.35 microns (IR)
Field of view Up to 130° max. angle
Operating temperature -55°C to +85°C (-67°F to +185°F)
Storage temperature -40°C to +85°C (-40°F to +185°F)
Operating humidity 0% to 95% non-condensing
Mounting Stainless steel mounting bracket
Cable entry 2 x 3/4” NPT of 2 x 25 mm
Weight 4 kg
Diameter 114 mm
Housing 316 Stainless steel powder coated