Stony Brook Scientific Ltd.
Home Technology

Products

 News Publications Customers Contact Us Corporate Profile
Product Overview
Disposable Viscometer
Portable/Disposable Viscometer
High Pressure
High Temperature
Viscometer
Falling/Controlled
Needle Viscometer
Caulking Viscometer
High Temperature Viscometer


FNV-200/CNV-100 Falling / Controlled Needle Viscometer  
Download FNV-200/CNV-100 Datasheet In Adobe PDF Format

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.
 

Key Advantages:

  • Measures Absolute Viscosity without Instrument Calibration
  • Better than One Percent Accuracy and Repeatability
  • Large Viscosity Range: 0.1 to 108 cP
  • Accurate Temperature Control
  • Large Temperature Range of Fluids
  • Simultaneous Density and Viscosity Measurements
  • Thermal Expansion Coefficient
  • Relative Sedimentation Rates
  • Automatic Falling Time Measurements to 0.001 s
  • Microprocessor-based Console with RS-232 Interface
     

Specifications for FNV-200 Falling Needle Viscometer 

Viscosity Range 0.5 to 2.4x106 cP (mPa s)*
Shear Rate Range Approx. 10-4 to 104 1/s**
Temperature Range -40 to 150oC*
Accuracy & Repeatability Better than 1%
Test Sample Volume Approx. 110cm3*
Needle Material Metal (Al, Ti, S.S.) or Glass
Needle Densities 1.01 to 8 g/cm3*
Total Instrument Weight 18.2 kg (40 lbs)
Size O.A.H. 55cm, O.A.W. 36cm

 

*outside this range consult SBS.

**depends on the sample and system.

Specifications for CNV-100 Controlled Needle Viscometer

Metal (Ti or Al) Needle Kit

Viscosity Range 0.1 to 30 cP (mPa s)*
Accuracy & Repeatability Better than 1%
Test Sample Volume Approx. 85cm3*

Small Sample Insert Kit

Viscosity Range 3 to 108 cP (mPa s)*
Accuracy & Repeatability Better than 1%
Test Sample Volume Approx. 7cm3*

*outside this range consult SBS.


Send mail to [email protected] with questions or comments about this web site.
Copyright � 2002 Stony Brook Scientific, Ltd.
Hosted by www.Geocities.ws

1