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北京藍景世紀科技R2868，13 年批號新到貨，全新原裝，假一罰十。 These are ultraviolet sensors that utilize the photoelectric effect of metal gas multiplication effect. Flame sensors have high sensitivity a wide field of view (directivity) that allow them to swiftly reliably detect the weak ultraviolet rays emitted from flames (fexample, flame from cigarette lighter more than 5 meters away). This feature makes them ideal as flame detectors fire alarms. Specifications R2868相關參數如下： Spectral Response (Short) 185 nm Spectral Response (Long) 260 nm Window Material UV glass Weight Approx. 1.5 g Discharge Starting Voltage (with UV radiation) (Max.) 280 Vdc Recommended Operating Voltage 325 /-25 Vdc Background (Max.) *a 10 min-1 Sensitivity (Typ.) *b 5000 min-1 Maximum Ratings Supply Voltage 400 Vdc Maximum Ratings Peak Current *c 30 mA
