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