Marsh Funnel Viscosity meter is a instrument to mensurate the relative viscosity of mud (compare with water). It could indicate the effective viscosity (apparent viscosity) and enjoins the advantages of simple mechanism and convenient operation. The larger the funnel viscosity (the seconds) is, the larger is the apparent viscosity of mud.

Ordinarily the mud flow in lamellar or structural phase, it reflects the varieties of the viscosity and consistency of mud logically.

Structure

It made up with conic Marsh funnel, filter screen with 6 holes per cm and two measuring cups with the capacity of 946ml and 1500mal.

马氏漏斗粘度计是日常现场用来测定泥浆（和水比较）相对粘度，它结构简单，操作方便，反映在某一条件下的有效粘度。漏斗粘度（秒数）越大，反映出泥浆的表观粘度越大。

  一般泥浆都呈层流或结构态流出，它对泥浆粘度及稠度的变化有合理的反映。

马氏漏斗粘度计结构

      它有锥体马氏漏斗，12目的滤网和946ml量杯、2000ml量杯组成。

马氏漏斗粘度计技术参数

（1） 马氏漏斗：

   锥体上口直径为152mm,锥体下口直径与导流管直径为4.76mm,长度50.8mm。锥体长度为305mm，漏斗总长为356mm。

（2） 筛网孔径为（1.6mm）12目

(3)滤网以下容积：1500ml

(4)标准量杯946ml有刻线

(5)本产品执行标准：

Technical parameters

(1) Marsh Funnel:

The diameter of the upper hole of the cone is 152mm, the diameter of lower hole and the diversion pipe is 4.76mm, the length of the cone is 305mm, and the length of the total funnel is 356mm.

(2)Filter screen: 6 holes per cm (mesh of 16).

(3)Standard measuring cup is 946ml.

(4) This product follows the standard of Q/02QFY002-2008.

Operatiing rules

(1) Hold the funnel vertically; put the filter screen on the upper hole of the funnel; blind the export of diversion pipe with your index finger.

(2) Pour sample of candidate mud into the funnel through filter screen till the mud level attain the underside of the filter screen.

(3) Prepare the stopwatch. Move your index finger and meanwhile put down the button of stopwatch. Stop the stopwatch the soon as measuring cup with the capacity of 946ml is full. Note the time of this process, and the funnel viscosity of mud is expressed in time of seconds.