RDFD - 100 type ultraviolet flame detector (hereinafter referred to as the detector) for ultraviolet photoelectric type photosensitive detector, it by detecting substances produced by ultraviolet light to detect fire burning, applicable to the easy generation open flames when the fire broke out, to seriously when the fire flame radiation and need to make a quick response to the flame of establishments are this detector can be used. When the sensor data is consistent with the fire data and confirmed to be correct, the detector sends out the fire alarm signal and inputs the signal to the fire monitoring system.