The General Monitors FL500-H2 UVIR Flame Detector by MSA delivers high speed flame detection with increased false alarm immunity in a compact design for hydrogen flame detection. The FL500-H2 UV/IR Flame Detector monitors for radiation emitted by a hydrogen flame in both the ultraviolet (UV) and infrared (IR) spectral ranges. This UV/IR combination provides a fast response time and increased false alarm immunity against sources of radiation for reliable protection. Continuous Optical Path Monitoring (COPM) performs self-check every two minutes to ensure the optical path is clear and the electronic circuitry is functional. Easily test with our exclusive TL105 Test Lamp that allows the FL500-H2 UV/IR Flame Detector to be safely tested under real fire conditions with a simulated flicker of a flame. Multiple output options including industry standard 4-20 mA (source or sink analog), Modbus, HART, relays.