液(ye)(ye)(ye)(ye)氮(dan)(dan)報警(jing)器內包(bao)含有(you)溫(wen)度(du)傳感(gan)器，它(ta)安裝(zhuang)到液(ye)(ye)(ye)(ye)氮(dan)(dan)罐(guan)內，液(ye)(ye)(ye)(ye)氮(dan)(dan)罐(guan)注入液(ye)(ye)(ye)(ye)氮(dan)(dan)后，溫(wen)度(du)會(hui)發(fa)生變化，特(te)別是液(ye)(ye)(ye)(ye)氮(dan)(dan)與氣(qi)態液(ye)(ye)(ye)(ye)氮(dan)(dan)之間的溫(wen)度(du)變化會(hui)更大，而通常液(ye)(ye)(ye)(ye)氮(dan)(dan)報警(jing)器氣(qi)態液(ye)(ye)(ye)(ye)氮(dan)(dan)部(bu)分是液(ye)(ye)(ye)(ye)氮(dan)(dan)液(ye)(ye)(ye)(ye)位或(huo)(huo)液(ye)(ye)(ye)(ye)氮(dan)(dan)高(gao)度(du)的位置，這樣，溫(wen)度(du)傳感(gan)器就(jiu)可根據溫(wen)度(du)差或(huo)(huo)溫(wen)度(du)變化感(gan)知到液(ye)(ye)(ye)(ye)氮(dan)(dan)液(ye)(ye)(ye)(ye)位或(huo)(huo)液(ye)(ye)(ye)(ye)氮(dan)(dan)高(gao)度(du)是否過低。

液氮報(bao)警(jing)(jing)器(qi)采用(yong)(yong)(yong)專用(yong)(yong)(yong)電化學式進口傳感器(qi)，精度(du)高、穩(wen)定(ding)性能(neng)強，主要由氣(qi)體探測(ce)器(qi)和(he)液氮報(bao)警(jing)(jing)器(qi)兩部分組成，氣(qi)體探測(ce)器(qi)用(yong)(yong)(yong)來檢測(ce)氮氣(qi)的具(ju)體濃(nong)度(du)值，液氮報(bao)警(jing)(jing)器(qi)用(yong)(yong)(yong)來顯示探測(ce)器(qi)檢測(ce)到的濃(nong)度(du)值，當濃(nong)度(du)值超出(chu)報(bao)警(jing)(jing)點(dian)時，進行報(bao)警(jing)(jing)提醒(xing)。

采用(yong)(yong)鉑電阻傳感(gan)器(qi)，經過高精(jing)度(du)(du)轉(zhuan)換模塊，采用(yong)(yong)智能(neng)化設(she)計(ji)，具(ju)有液(ye)(ye)氮(dan)液(ye)(ye)位聲(sheng)光預警(jing)、報警(jing)，溫度(du)(du)顯示，溫度(du)(du)數字調節、校準等功(gong)能(neng)。用(yong)(yong)于(yu)監測容(rong)器(qi)內指定(ding)位置的(de)液(ye)(ye)位，同時(shi)(shi)可(ke)測量容(rong)器(qi)內的(de)溫度(du)(du)，能(neng)準確地對低液(ye)(ye)位發出報警(jing)信號，即當液(ye)(ye)氮(dan)液(ye)(ye)面低于(yu)傳感(gan)器(qi)下端時(shi)(shi)，發出聲(sheng)光報警(jing)信號，提醒用(yong)(yong)戶添加(jia)液(ye)(ye)氮(dan)。可(ke)選配控(kong)制功(gong)能(neng)，實現自動補充液(ye)(ye)氮(dan)，定(ding)時(shi)(shi)停止，補充液(ye)(ye)氮(dan)的(de)時(shi)(shi)間用(yong)(yong)戶自行設(she)定(ding)。

液氮(dan)(dan)(dan)報(bao)(bao)警器(qi)(qi)的使用方(fang)法：低液位報(bao)(bao)警器(qi)(qi)主要(yao)用于(yu)液氮(dan)(dan)(dan)低液位報(bao)(bao)警，可(ke)以適用各(ge)類液氮(dan)(dan)(dan)罐，安裝和卸載也(ye)非常方(fang)便(bian)：液氮(dan)(dan)(dan)液位監(jian)控器(qi)(qi)采用了智(zhi)能化設計，具(ju)有液氮(dan)(dan)(dan)液位聲(sheng)光(guang)預警、報(bao)(bao)警，溫度(du)顯示，自動補液，數字溫度(du)調節、校(xiao)準等功能。用于(yu)監(jian)控低溫容器(qi)(qi)內(nei)樣本所需(xu)的液面高(gao)度(du)，能準確(que)地(di)發出越限報(bao)(bao)警信號。