Hamamatsu R2868 是利用紫外线 TRON 通过金属的光电效果和瓦斯乘法效果来发现火星源. 它可以探测 185 到 260个不同的狭窄光谱敏感源.它对可见光完全没有感应,也不需要过滤器任何可见光(不像半导体探测器). 它具有很小的体积和很宽敏感角度(择向性),并能快速准确地发现从火焰被发出的弱紫外线.(能够探测 5 m 或在稍远处发现香烟点大小的火焰)。
R2868日本HAMAMATSU公司生产的火焰传感器的技术指标
Compact UV Sensor with High Sensitivity and Wide Directivity,
Suitable for Flame Detectors and Fire Alarms.
Hamamatsu 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.
APPLICATIONS
★ Flame detectors for gas/oil lighters and matches
★ Fire alarms
★ Combustion monitors for burners
★ Inspection of ultraviolet leakage
★ Detection of discharge
★ Ultraviolet switching
GENERAL
Spectral Response185 to 260nm
Window Material UV glass
Weight Approx. 1.5g
MAXIMUM RATINGS
Supply Voltage 400Vdc
Peak Current 30mA
Average Discharge Current 1ma
Operating Temperature -20 to +60C
CHARACTERISTICS (at 25C)
Discharge Starting Voltage (with UV radiation) 280Vdc Max.
Recommended Operating Voltage 325±25Vdc
Recommended Average Discharge Current 100μA
Background 10cpm Max
Sensitivity 4)5000cpm Typ.
★UV TRON Driving Circuit C3704 series (Option)
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