變送器的概念是將非標準電信號轉換為標準電信號的儀器
，傳感器zeshijiangwulixinhaozhuanhuanweidianxinhaodeqijian

，guoquchangjiangwulixinhao，xianzaiqitaxinhaoyeyoule。yiciyibiaozhixianchangceliangyibiaohuojidikongzhibiao，erciyibiaozhiliyongyicibiaoxinhaowanchengqitagongneng：諸如控製，顯示等功能的儀表。
    傳感器是能夠受規定的被測量並按照一定的規律轉換成可用輸出信號的器件或裝置的總稱,通常由敏感元件和轉換元件組成。當傳感器的輸出為規定的標準信號時，則稱為變送器。 
傳感器和變送器本都屬於熱工儀表。
    傳感器是把非電物理量如溫度
、壓力、液位、物料、氣體特性等轉換成電信號或把物理量如壓力
、yeweidengzhijiesongdaobiansongqi。biansongqizeshibachuanganqicaijidaodeweiruodedianxinhaofangdayibianzhuansonghuoqidongkongzhiyuanjian。huojiangchuanganqishurudefeidianliangzhuanhuanchengdianxinhaotongshifangdayibiangongyuanfangcelianghekongzhidexinhaoyuan。genjuxuyaohaikejiangmoniliangbianhuanweishuziliang。
    傳(chuan)感(gan)器(qi)和(he)變(bian)送(song)器(qi)一(yi)同(tong)構(gou)成(cheng)自(zi)動(dong)控(kong)製(zhi)的(de)監(jian)測(ce)信(xin)號(hao)源(yuan)。不(bu)同(tong)的(de)物(wu)理(li)量(liang)需(xu)要(yao)不(bu)同(tong)的(de)傳(chuan)感(gan)器(qi)和(he)相(xiang)應(ying)的(de)變(bian)送(song)器(qi)。還(hai)有(you)一(yi)種(zhong)變(bian)送(song)器(qi)不(bu)是(shi)將(jiang)物(wu)理(li)量(liang)變(bian)換(huan)成(cheng)電(dian)信(xin)號(hao)，如(ru)一(yi)種(zhong)鍋(guo)爐(lu)水(shui)位(wei)計(ji)的(de)“差壓變送器”，tashijiangyeweichuanganqilidexiabudeshuiheshangbuzhengqidelengningshuitongguoyibiaoguansongdaobiansongqidebowenguanliangce，yibowenguanliangcedechayadaidongjixiefangdazhuangzhiyongzhizhenzhishishuiweideyizhongyuanfangyibiao。dangranhaiyoubadianqimoniliangbianhuanchengshuziliangdeyekeyijiaobiansongqi。