SDW系(xi)列型電(dian)(dian)(dian)阻(zu)式(shi)（也稱(cheng)電(dian)(dian)(dian)位(wei)器式(shi)）位(wei)移(yi)(yi)計可(ke)(ke)直接埋設在(zai)水工建(jian)筑物及其它結(jie)構(gou)(gou)的(de)混凝(ning)土內，也可(ke)(ke)安裝在(zai)建(jian)筑物表面(mian)，可(ke)(ke)在(zai)惡劣環境(jing)下長期監(jian)測結(jie)構(gou)(gou)裂縫和(he)接縫的(de)開(kai)合(he)度。外置萬向(xiang)(xiang)節允許一定程度的(de)剪切變形。選購配(pei)套設備，可(ke)(ke)組成SDW-B系(xi)列型電(dian)(dian)(dian)阻(zu)式(shi)雙(shuang)向(xiang)(xiang)位(wei)移(yi)(yi)計、SDW-T系(xi)列型電(dian)(dian)(dian)阻(zu)式(shi)三(san)向(xiang)(xiang)位(wei)移(yi)(yi)計、SDW-K系(xi)列型電(dian)(dian)(dian)阻(zu)式(shi)脫空計等，用(yong)于(yu)混凝(ning)土面(mian)板壩(ba)、堆(dui)石(shi)壩(ba)的(de)脫空位(wei)移(yi)(yi)監(jian)測及周邊(bian)縫、基巖軟弱夾層兩側巖體的(de)錯動(dong)等雙(shuang)向(xiang)(xiang)及三(san)向(xiang)(xiang)裂縫監(jian)測。