供应QRA2

QRA2系列火焰探测器-电眼 
**：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 **. 
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