Hamamatsu Flame sensor (UV TRON) R2868 + drive C10807

R2868 is a UVTRON ultraviolet ON/OFF detector that makes use of the photoelectric effect of metal and the gas multiplication effect. It has a narrow spectral sensitivity of 185 nm to 260 nm, being completely insensitive to visible light. Unlike semiconductor detectors, it dose not require optical visible-cut filters, thus making it easy to use.

C10807 series was developed for UVTRON driving circuit as alterna-tive to C3704, that is also used as singnal processing circuits. By using a double-sided printed circuit board we cut the area size to half that of conventional drive circuits.
Since the high-voltage supply and signal processor are mounted on the same circuit board, the C10807 can be operated as a high-sensitivity UV sensor just by connecting a UVTRON and supplying a low DC voltage.The signal processing circuit cancels out background discharges which may occur in the UVTRON due to natural excitation light (cos-mic rays, solar UV rays, etc.). This minimizes erroneous detection so the C10807 output signal can be used without additional filtering.Combining the C10807 with a high-sensitivity "UVTRON R9533, R2868" (sold separately) for use as a flame detector yields sensitivity capable of detecting the flame from a cigarette lighter (flame length 25
mm) even at distances up to 5 meters away.

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