Viscolead Series

Durable, classic design. Price range: low. Delivering the best in efficiency and reliability, our rotational viscometers Viscolead Series are designed for solid performance and consistent, user-friendly experience. Equipped for flexible functionality, the viscolead viscometer series are suitable for a wide range of testing environments- even in the toughest of laboratory conditions. Economical and cost- effective, the Viscolead series product range is an ideal choice for the budget conscious user requiring straightforward and dependable productivity. Models:

Viscolead ONE

Viscolead ADV

Accessories

LABORATORY DIVISION

Dynamic viscosity

Viscosity is part of the science of Rheology which quantifies the resistance materials give to changing shape.

Proper interpretation of viscosity data can reduce the rate of rejects while keeping production and formulation development costs to a minimum. Consistent product quality is ensured through proper viscosity measurements, either alone or in conjunction with compatible tests.

Dynamic viscosity testing can help with:

Material characterization or “finger-printing”
Standard testing methods to check for differences between batches
Indirect way of measuring quality
Product formulation
Quality control
Process control
Design, optimization and operation of process equipment

Material characterization or “finger-printing”

Standard testing methods to check for differences between batches

Indirect way of measuring quality

Product  formulation

Quality  control

Process  control

Design, optimization and operation of process equipment

Viscosity types

Dynamic viscosity

Poise
Centipoise (mPa*s)

Kinematic viscosity

Stokes
Centistokes (mm2/sec)

Apparent viscosity

Poise
Centipoise (mPa*s)

Newton’s Law

According to Newton’s law, the viscosity of a fluid is constant. As shear rate changes, shear stress changes in proportion such that viscosity is constant. Common fluids that exhibit such behavior are:

Unfortunately for us, not all fluids follow Newton’s law. In fact, most fluids do not. For this reason, fluids are classified into two categories:

Rotational Viscometer

The viscosity is calculated from the measured torque and rotational speed, as well as the dimensions of the measuring geometry.
A fluid’s resistance to flow is measured by the torque it exerts on the rotating shaft of the viscometer.

Absolute viscosity: the measuring geometry fulfills certain requirements (which is the case of coaxial spindles).‏

‏Relative viscosity: the dimensions of the measuring geometry are not well defined.

Advantage

Flexibility in:

Application

For Newtonian and non-Newtonian substances and temperatures different from room temperature.