原装德国西门子光电管

品牌 西门子 型号 QRA2 种类 配件组件 QRA2系列火焰探测器-电眼品牌：SIEMENS（西门子）产地：德国产品介绍The flame detectors are used for the supervision of gas flames, yellow- or blue-burning oil flames and for ignition spark proving.With this type of flame supervision, the UV radiation emitted by gas or oil flames is used to generate the flame signal.The radiation detector consists of a UV-sensitive cell with 2 electrodes, which ignite when illuminated with radiation in the 190...270 nm range of the spectrum, thereby triggering a current in the flame detector circuit.The UV cell does not respond to glowing firebrick in the combustion chamber, daylight or light from the boiler room illumination.技术参数主要参数UV单元平均寿命10000小时（在50ºC）保护等级IP40重量60g环境条件运输环境IEC 60 721-3-2内部条件class 2K2机械条件class 2M2温度范围-20...+60ºC湿度<95%运行环境IEC 60 721-3-3内部条件class 3K5机械条件class 3M2温度范围-20...+60ºC湿度<95%不得进水