Viscosity is measured in many industries, but the largest users are quality control departments using single point measurements. Research scientists also use viscometers to see how materials respond to shear. The task at hand determines the type of viscometer used - different viscometers measure different viscosity magnitudes and different viscosity changes. According to a professional, an important factor to consider when buying a viscometer is robustness, even if the user has to give up some sensitivity.
Six Questions You Should Ask When Purchasing a Viscometer
What temperature control and spindle speed control does the instrument offer? The importance of temperature is self-evident, as viscosity generally increases as a fluid cools. Spindle rotation may also affect viscosity.
What accessories (such as sample holders) does the company provide for the instrument?
How easy is a viscometer to use? Since most users these days are not professionals, an easy-to-use instrument may be a good choice for most laboratories.
What is the sample size you will be using? This can be a problem when analyzing very expensive materials such as drugs or proteins, and cost of ownership is also important for high-volume applications.
What is the measuring range of the instrument? If you're analyzing oil from crude oil to gasoline, do you want to change the capillary for every measurement, or use something that always works?
What kind of service and support does the company provide?
