此R6828产品为Hamamatsu日本公司生产， R2868 is a UV TRON ultraviolet detector that makes use of the photoelectric effect of metal and the gas multiplication effect. It has a narrow spectral sensitivity of 185 to 260 nm, being completely insensitive to visible light. Unlike semiconductor detectors, it does not require optical visible-cut filters, thus making it easy to use. In spite of its small size, the R2868 has wide angular sensitivity (directivity) and can reliably and quickly detect weak ultraviolet radiations emitted from flame due to use of the metal plate cathode (eg. it can detect the flame of a cigarette lighter at a distance of more than 5 m.). The R2868 is well suited for use in flame detectors and fire alarms, and also in detection of invisible discharge phenomena such 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 Max
Sensitivity 4) 5000cpm Typ.