熱敏電阻傳感器主要元件是熱敏電阻
，當熱敏材料周圍有熱輻射時，它就會吸收輻射熱，產生溫度升高，引起材料的阻值發生變化。

 

 

作為測量溫度的熱敏電阻傳感器一般結構較簡單
，價格較低廉。沒有外麵保護層的熱敏電阻隻能應用在幹燥的地方;密封的熱敏電阻不怕濕氣的侵蝕、keyishiyongzaijiaoeliedehuanjingxia。youyuremindianzuchuanganqidezuzhijiaoda，guqilianjiedaoxiandedianzuhejiechudianzukeyihulve，yinciremindianzuchuanganqikeyizaichangdajiqianmideyuanjuliceliangwenduzhongyingyong，celiangdianluduocaiyongqiaolu。liyongqiyuanlihaikeyiyongzuoqitacewen、控溫電路等。

 

 

remindianzuchuanganqikezaiyidingdewendufanweineiduimouxieyuanqijianshidujinxingbuchang。liru，dongquanshiyibiaobiaotouzhongdedongquanyoutongxianraozhiercheng。wendushenggao，dianzuzengda，yinqiwendudewucha。yinerkeyizaidongquandehuiluzhongjiangfuwenduxishuderemindianzuyumengtongsidianzubinglianhouzaiyubeibuchangyuanqijianchuanlian
，congerdixiaoneiyuwendubianhuasuochanshengdewucha。zaijingtiguandianlu、對數放大器中，也常用熱敏電阻組成補償電路。補償由於溫度引起的漂移誤差。

 

過guo熱re保bao護hu分fen直zhi接jie保bao護hu利li間jian接jie保bao護hu。對dui小xiao電dian流liu場chang合he，可ke把ba熱re敏min電dian阻zu傳chuan感gan器qi直zhi接jie串chuan人ren負fu載zai中zhong
，防fang止zhi過guo熱re損sun壞huai以yi保bao護hu器qi件jian，對dui大da電dian流liu場chang合he
，可ke用yong於yu對dui繼ji電dian器qi、晶jing體ti管guan電dian路lu等deng的de保bao護hu。不bu論lun哪na種zhong情qing況kuang，熱re敏min電dian阻zu都dou與yu被bei保bao護hu器qi件jian緊jin密mi結jie合he在zai一yi起qi，從cong而er使shi兩liang者zhe之zhi間jian充chong分fen進jin行xing熱re交jiao換huan，一yi旦dan過guo熱re，熱re敏min電dian阻zu則ze起qi保bao護hu作zuo用yong。例li如ru，在zai電dian動dong機ji的de定ding子zi繞rao組zu中zhong嵌qian入ru突tu變bian型xing熱re敏min電dian阻zu傳chuan感gan器qi並bing與yu繼ji電dian器qi串chuan聯lian。當dang電dian動dong機ji過guo載zai時shi，定ding子zi電dian流liu增zeng大da，引yin起qi發fa熱re。當dang溫wen度du大da於yu突tu變bian點dian時shi
，電dian路lu中zhong的de電dian流liu可ke以yi內nei十shi分fen之zhi幾ji毫hao安an突tu變bian為wei幾ji十shi毫hao安an

，因yin此ci繼ji電dian器qi動dong作zuo，從cong而er實shi現xian過guo熱re保bao護hu。

 

 

給NTC熱(re)敏(min)電(dian)阻(zu)傳(chuan)感(gan)器(qi)施(shi)加(jia)一(yi)定(ding)的(de)加(jia)熱(re)電(dian)流(liu)
，它(ta)的(de)表(biao)麵(mian)溫(wen)度(du)將(jiang)高(gao)於(yu)周(zhou)圍(wei)的(de)空(kong)氣(qi)溫(wen)度(du)

，此(ci)時(shi)它(ta)的(de)阻(zu)值(zhi)較(jiao)小(xiao)。當(dang)液(ye)而(er)高(gao)於(yu)它(ta)的(de)安(an)裝(zhuang)高(gao)度(du)時(shi)
，液(ye)體(ti)將(jiang)帶(dai)走(zou)它(ta)的(de)熱(re)量(liang)，使(shi)之(zhi)溫(wen)度(du)下(xia)降(jiang)、zuzhishenggao。panduantadezuzhibianhua，jiukeyizhidaoyemianshifoudiyushedingzhi。qicheyouxiangzhongdeyouweibaojingchuanganqijiushiliyongyishangyuanlizhizuode。remindianzuzaiqichezhonghaiyongyuceliangyouwen、冷卻水混等。