The shell material is made of thickened explosion-proof sapphire panel. The detector uses a special filter glass panel to filter light, which can filter the interference of stray light. Flame detection distance up to 50M; The infrared detection Angle of 90° and ultraviolet 120° detector is a composite red ultraviolet flame detection device, which can collect radiation information of light sources in different bands and enhance the stability of the detector to a great extent. Glass fouling fault reporting function, optional.