將物理(li)測(ce)量(liang)信(xin)號(hao)或普通電信(xin)號(hao)轉(zhuan)(zhuan)換為標(biao)準電信(xin)號(hao)輸出或能(neng)夠以(yi)通訊協議方式輸出的設備(bei)。溫度(du)變(bian)送(song)器(qi)是將溫度(du)變(bian)量(liang)轉(zhuan)(zhuan)換為可傳送(song)的標(biao)準化(hua)輸出信(xin)號(hao)的儀(yi)表，主要用于工業過程溫度(du)參數的測(ce)量(liang)和控(kong)制。電流變(bian)送(song)器(qi)是將被測(ce)主回路交流電流轉(zhuan)(zhuan)換成恒流環(huan)標(biao)準信(xin)號(hao)，連續輸送(song)到接收裝(zhuang)置。
溫度(du)電(dian)(dian)流(liu)(liu)變(bian)(bian)送(song)器是把(ba)溫度(du)傳(chuan)(chuan)感器的信號(hao)(hao)轉(zhuan)變(bian)(bian)為(wei)(wei)(wei)電(dian)(dian)流(liu)(liu)信號(hao)(hao)，連接(jie)到(dao)二次(ci)儀表(biao)上，從而(er)顯(xian)示(shi)出(chu)對應(ying)的溫度(du)。比如，圖中該(gai)溫度(du)傳(chuan)(chuan)感器的型號(hao)(hao)為(wei)(wei)(wei)PT100，那么溫度(du)電(dian)(dian)流(liu)(liu)變(bian)(bian)送(song)器的作用就是把(ba)電(dian)(dian)阻信號(hao)(hao)轉(zhuan)變(bian)(bian)為(wei)(wei)(wei)電(dian)(dian)流(liu)(liu)信號(hao)(hao)，輸入儀表(biao)，顯(xian)示(shi)溫度(du)。
