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儀器簡介：

The Falling Needle Viscometer (FNV) consists of a metal or glass needle with hemispherical ends falling vertically in a fluid with its longitudinal axis along the axis of a cylindrical container. Also， the Controlled Needle Viscometer (CNV) consists of a metal needle with hemispherical ends and its top end is connected to the extension bar plus the weight holder. The CNV is the same as the FNV except for the needle dropped. A measurement of the needle terminal velocity allows a determination of the viscous properties and density of the test fluid. The falling time is measured automatically by means of Hall sensors and a magnet in the needle. The CNV comes with a small sample insert kit for those cases when the sample supply is limited. For Non-Newtonian fluid， a computer program is available from SBS.

Applications:

Adhesives， Aerosols， Automobile Fluids， Biomaterials， Coal Slurries， Coatings， Colloids， Cosmetics， Creams， Dairy Products， Detergents， Dispersions， Emulsions， Fertilizers， Foams， Fuels， Gels， Grease， Honey， Inks， Ketchup， Latex， Lubricants， Mayonnaise， Milk， Oils， Ointments， Paints， Petroleum， Polymers， Proteins， Pulp， Resins， Shampoos， Slurries， Soaps， Solutions， Surfactants， Suspensions， Varnish and many more.

技術參數：

Falling Needle Viscometer (FNV-200 ) Specifications:

1、Viscosity Range：0.5 to 2.4x106 cP (mPa s)

2、Shear Rate Range：Approx. 10-4 to 104 1/s

3、Temperature Range：-40 to 150°C

4、Accuracy & Repeatability：Better than 1%

5、Test Sample Volume：Approx. 110cm³

6、Needle Material Metal：(Al， Ti， S.S.) or Glass

7、Needle Densities：1.01 to 8 g/cm³

8、Total Instrument Weight：18.2 kg (40 lbs)

9、Size：O.A.H. 55cm， O.A.W. 36cm

Controlled Needle Viscometer (CNV-100) Specifications:

1、Metal：(Ti or Al) Needle Kit

2、Viscosity Range：0.1 to 30 cP (mPa s)

3、Accuracy & Repeatability：Better than 1%

4、Test Sample Volume：Approx. 85cm³

主要特點：

1、Measures Absolute Viscosity without Instrument Calibration

2、Better than One Percent Accuracy and Repeatability

3、Large Viscosity Range: 0.1 to 106 cP

4、Accurate Temperature Control

5、Large Temperature Range of Fluids

6、Simultaneous Density and Viscosity Measurements

7、Thermal Expansion Coefficient

8、Relative Sedimentation Rates

9、Automatic Falling Time Measurements to 0.001 s

10、Microprocessor-based Console with RS-232 Interface