Research scientists also use viscometers to see how a material reacts to being sheared. The task at hand determines the kind of viscometer to use—different viscometers measure different magnitudes of viscosity and different changes in it. According to one expert, the most important factor to consider when buying a viscometer is robustness, even if users have to give up some sensitivity.
Top 6 Questions You Should Ask When Buying a Viscometer
- What kind of temperature control and spindle rotational speed control does the instrument offer? Temperature is critical, since viscosity generally rises as a fluid cools. Spindle rotation may also affect viscosity.
- What range of accessories (ex. sample holders) does the company offer for the instrument?
- How easy to use is the viscometer? Since most users nowadays aren’t experts, an easy-to-use instrument is probably the best fit for most labs.
- What are the sizes of the samples you’ll be working with? This may be an issue when analyzing very expensive materials such as drugs or proteins and cost of ownership is also important for high-volume applications.
- What is the instrument’s measurement range? If you’re analyzing petroleum, from crude oil to gasoline, do you want to change out the capillary for each measurement, or use something that works all the way through?
- What kind of service and support does the company provide?
Viscometer types used by survey respondents:
|U-Tube / Ostwald Viscometer||29%|
|Falling Ball Viscometer||8%|
|Falling Piston Viscometer||1%|
|Rectangular Slit Viscometer||1%|
Frequency of viscometer usage by survey respondents:
|Several times daily||45%|
|Several times each week||24%|
|Two to three times a month||11%|
|Less than once a month||20%|
Nearly 51% of respondents are engaged in purchasing a new viscometer. The reasons for these purchases are as follows:
|Replacement of aging systems||
|Addition to existing systems, increase capacity||
|Setting up a new lab||
|First time purchase||
Top 10 Features/Factors Respondents Look for When Purchasing a Viscometer:
|Durability / Rugged design||67%|
|Onsite service / support||34%|
For more information on viscometers, including useful articles and a list of manufacturers, visit www.labmanager.com/viscometers