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Hydrogen Flame Detector – FL3100H-H2 UV/IR

Hydrogen Flame Detector
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Hydrogen Flame Detector – FL3100H-H2 UV/IR

UV/IR Hydrogen Flame Detector – General Monitors FL3100H

The Model FL3100H is an Ultraviolet / Infrared Hydrogen Flame Detector designed specifically to detect hydrogen fires and provide alarm outputs directly from the detector while maintaining false alarm immunity.

It detects H2 fires by monitoring in both the ultraviolet (UV) and infrared (IR) spectral ranges, making it highly immune to false alarms. Configurations with dual Modbus and HART are available. Modbus and HART data can be used for predictive maintenance. The flame detector’s electronics are integral within its explosion-proof housing, allowing detector information to be processed at the point of detection.


  • Wide field of view for greater fire detection coverage for hydrogen fires
  • 4-20 mA stepped output is the industry standard for remote alarm and fault indication
  • HART and dual Modbus communication provides complete status and control capability in the control room
  • Wide operating temperature range permits operation at higher ambient temperature
  • Continuous Optical Path Monitoring (COPM) checks optical path integrity and detector’s electronic circuitry once every minute
  • Three SPDT high current programmable relay outputs provide immediate and time delayed relay outputs for alarm, programmable relay outputs


  • Chemical plants
  • Hydrogen gas generators
  • Hydrogen storage facilities
  • Hydrogen refilling stations
  • Hydrogen test facilities
  • Locations with hydrogen fuel cells
  • Refineries
  • Semiconductor facilites