數顯粘度計DV-79是一種測量各種牛頓型液體的粘度和非牛頓型液體的表觀粘度的精密儀器。如與特定轉子配用，還可以測定非牛頓型液體的流變性。它具有使用方便、性能穩定、維護簡單等優點，適用于測量各種油脂、油漆、油墨、涂料、塑料、漿料、橡膠、乳膠、洗滌劑、樹脂、煉乳、奶油、藥物以及化妝品等各種流體的粘度，是紡織、化工、石油、機電、醫藥、食品、輕工、建筑、等行業以及大專院校，科研單位，軍工部門。

數顯粘度計DV-79儀器的驅(qu)動(dong)(dong)是(shi)靠一個微型的同步電(dian)(dian)動(dong)(dong)機，它以750 r/min的恒速旋轉(zhuan)(zhuan)(zhuan)(zhuan)，幾(ji)乎不受荷(he)載和電(dian)(dian)源電(dian)(dian)壓變化(hua)的影響。電(dian)(dian)動(dong)(dong)機的殼體采用懸掛式(shi)安裝，它通過轉(zhuan)(zhuan)(zhuan)(zhuan)軸帶動(dong)(dong)轉(zhuan)(zhuan)(zhuan)(zhuan)筒旋轉(zhuan)(zhuan)(zhuan)(zhuan)，當轉(zhuan)(zhuan)(zhuan)(zhuan)筒在(zai)被測(ce)液體中旋轉(zhuan)(zhuan)(zhuan)(zhuan)時收到粘滯阻力作(zuo)用，從而產生反作(zuo)用力使(shi)電(dian)(dian)動(dong)(dong)機殼體偏轉(zhuan)(zhuan)(zhuan)(zhuan)，電(dian)(dian)動(dong)(dong)機殼體與兩根一正一反安裝的金屬游絲相(xiang)連，殼體的轉(zhuan)(zhuan)(zhuan)(zhuan)動(dong)(dong)使(shi)游絲產生扭矩(ju)。