電容式變送器是采用(yong)(yong)(yong)(yong)*技(ji)術生產的高精度智(zhi)能(neng)儀(yi)表，其中(zhong)主要(yao)的原(yuan)材料、元(yuan)器(qi)(qi)件(jian)和零部(bu)件(jian)均采用(yong)(yong)(yong)(yong)進口，整(zheng)機經過嚴格(ge)(ge)組裝和測(ce)試。具有設計(ji)原(yuan)理先進、品(pin)種(zhong)規格(ge)(ge)齊(qi)全、安裝使(shi)用(yong)(yong)(yong)(yong)簡便(規格(ge)(ge)、尺(chi)寸(cun)與原(yuan)裝EJA*兼容)，外形美觀等特點。產品(pin)分智(zhi)能(neng)和普通(tong)型兩(liang)種(zhong)類型，滿(man)足用(yong)(yong)(yong)(yong)戶的多種(zhong)選擇要(yao)求，具有很強的使(shi)用(yong)(yong)(yong)(yong)價值，HJ-YDR電(dian)(dian)容式變送器(qi)(qi)廣泛應用(yong)(yong)(yong)(yong)于石油(you)、化工、冶金、電(dian)(dian)力(li)、食品(pin)、造紙、醫藥、機械制造等行業。
    電容式變送(song)器原理與(yu)應(ying)用：
    壓(ya)(ya)電(dian)(dian)(dian)(dian)傳(chuan)感器中主要(yao)使(shi)用的(de)壓(ya)(ya)電(dian)(dian)(dian)(dian)材(cai)料包(bao)括有石英、酒石酸(suan)鉀鈉和(he)磷(lin)酸(suan)二氫(qing)胺。其中石英（二氧化硅）是一(yi)種天然晶體(ti)(ti)，壓(ya)(ya)電(dian)(dian)(dian)(dian)效(xiao)應(ying)就(jiu)是在(zai)這種晶體(ti)(ti)中發現的(de)，在(zai)一(yi)定的(de)溫(wen)(wen)度(du)范圍(wei)之(zhi)內，壓(ya)(ya)電(dian)(dian)(dian)(dian)性(xing)質(zhi)一(yi)直存(cun)在(zai)，但(dan)溫(wen)(wen)度(du)超過這個范圍(wei)之(zhi)后，壓(ya)(ya)電(dian)(dian)(dian)(dian)性(xing)質(zhi)*消失（這個高溫(wen)(wen)就(jiu)是所(suo)謂的(de)“居里點(dian)”）。由于(yu)隨著(zhu)應(ying)力的(de)變(bian)化電(dian)(dian)(dian)(dian)場(chang)變(bian)化微小（也就(jiu)說(shuo)壓(ya)(ya)電(dian)(dian)(dian)(dian)系數(shu)比較低），所(suo)以(yi)石英逐漸(jian)被其他(ta)的(de)壓(ya)(ya)電(dian)(dian)(dian)(dian)晶體(ti)(ti)所(suo)替代。而酒石酸(suan)鉀鈉具有很(hen)大的(de)壓(ya)(ya)電(dian)(dian)(dian)(dian)靈(ling)敏(min)度(du)和(he)壓(ya)(ya)電(dian)(dian)(dian)(dian)系數(shu)，但(dan)是它只(zhi)能在(zai)室溫(wen)(wen)和(he)濕(shi)(shi)度(du)比較低的(de)環境(jing)下才能夠應(ying)用。磷(lin)酸(suan)二氫(qing)胺屬于(yu)人(ren)造晶體(ti)(ti)，能夠承(cheng)受高溫(wen)(wen)和(he)相(xiang)當(dang)高的(de)濕(shi)(shi)度(du)，所(suo)以(yi)已經得到了廣泛(fan)的(de)應(ying)用。