QRA2系列火焰探测器-电眼品牌：SIEMENS（西门子）产地：德国产品介绍Theflamedetectorsareusedforthesupervisionofgasflames,yellow-orblue-burningoilflamesandforignitionsparkproving.Withthistypeofflamesupervision,theUVradiationemittedbygasoroilflamesisusedtogeneratetheflamesignal.Theradiationdetectorc***istsofaUV-sensitivecellwith2electrodes,whichignitewhenilluminatedwithradiationinthe190...270nmrangeofthespectrum,therebytriggeringacurrentintheflamedetectorcircuit.TheUVcelldoesnotrespondtoglowingfirebrickinthecombustionchamber,daylightorlightfromtheboilerroomillumination.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IEC60721-3-2内部条件class2K2机械条件class2M2温度范围-20...+60ºC湿度<95%运行环境IEC60721-3-3内部条件class3K5机械条件class3M2温度范围-20...+60ºC湿度<95%不得进水)