QRB1系列火焰探测器-电眼品牌：SIEMENS（西门子）产地：德国产品介绍PhotoresistiveflamedetectorsforusewithLandis&Staefaburnercontrols,forthesupervisionofoilflamesinthevisiblelightspectrum.Theflamedetectorsareusedprimarilyinconnectionwithburnercontrolsfor***allburners.Withthistypeofflamesupervision,theradiationofoilflamesinthevisiblelightspectrumisusedforgeneratingtheflamesignal.Thelight-sensitiveelementisaphotoresistor.Whenthereisnolight,thedetector′sresistanceisintheMΩrange.Theresistancedropsastheintensityofilluminationincreases(kΩrange).IncontrasttotheseleniumphotocelloftheRAR...detectors,glowingfirebrickinthecombustionchambercanbedetected.技术参数主要参数保护等级IP40当连接至LOA.../LAL...时，电缆长度1.5m***大连接电缆2*0.75mm2,5.1mm直径重量20...35g环境条件运输环境IEC60721-3-2内部条件class2K2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)