此R6828产品为Hamamatsu日本公司生产，R2868 is a UV TRON ultraviolet detector that makesuse of the photoelectric effect of metal and the gas multiplicationeffect. It has a narrow spectral sensitivity of 185 to 260 nm, beingcompletely insensitive to visible light. Unlike semiconductordetectors, it does not require optical visible-cut filters, thusmaking it easy to use.In spite of its small size, the R2868 has wide angular sensitivity(directivity) and can reliably and quickly detect weak ultravioletradiations emitted from flame due to use of the metal platecathode (eg. it can detect the flame of a cigarette lighter at adistance of more than 5 m.).The R2868 is well suited for use in flame detectors and firealarms, and also in detection of invisible discharge phenomenasuch as corona discharge of high-voltage transmission lines.★     Flame detectors for gas/oil lighters and matches★     Fire alarms★     Combustion monitors for burners★     Inspection of ultraviolet leakage★     Detection of discharge★     Ultraviolet switching★     Spectral Response185 to 260nm★     Supply Voltage 400Vdc★     Peak Current 1) 30Ma★     Average Discharge Current 2) 1m★     Operating Temperature-20 to +60C★     Discharge Starting Voltage (with UV radiation)280Vdc Max.★     Recommended Operating Voltage325±25Vdc★     Recommended Average Discharge Current100A★     Background 3) 10cpm MaxSensitivity 4) 5000cpm Typ.