S600-ExIR2-UV point type infrared / UV flame detector contains two infrared wavelength sensors and a highly sensitive imported UV/ultraviolet sensor and optical filter. The ultraviolet sensor can respond to ultraviolet radiation at the moment of fire and explosive ignition. The other two infrared sensors, one has the highest sensitivity to the CO2 emission spectrum (4.4μm), and the other interferes with ambient light and heat radiation For detection, the detector makes a composite judgment on the ultraviolet and infrared signals generated in the event of a fire, and performs multi-signal processing in conjunction with the logical comprehensive judgment of the flame flicker frequency to minimize false alarms and the best fire detection performance required. The flame detector has an early warning function for the fire of organic materials such as hydrocarbons and the fire of inorganic materials.