Magnetic stirrers are a popular type of laboratory stirrer that use a rotating magnetic field to cause a stirrer bar to rotate within the solution. These stirrers are often combined with a hotplate and are ideal for small volumes of non-viscous liquids and for situations in which a reaction must take place in a closed vessel or system. The overhead stirrer, however, is more suitable for larger volumes and more viscous solutions, but can be less convenient and more time-consuming to set up.
Top 10 Questions You Should Ask When Buying a Stirrer or Mixer
- What applications are you using the stirrer or mixer for? What result do you want to accomplish?
- What are the maximum volume and the maximum viscosity that you can use the stirrer for?
- Which stirring element is best suited to your application?
- What are the features and specs of the stirrers or mixers available?
- What level of accuracy does the digital speed indicator have?
- What type of motor is used in the stirrer or mixer?
- Can you determine the viscosity with the torque trend measurement?
- Have you purchased everything you need to start mixing? Sometimes stirrers and mixers are sold as kits, while sometimes all or some of the accessories must be purchased separately.
- Does the manufacturing company offer application and technical support over the phone?
- What warranty and delivery options are available? How quickly will the new purchase arrive?
Types of stirrer(s) used by survey respondents:
|Hot Plate Stirrer||86%|
Stirrer problems reported by survey respondents:
|Stirrer can't handle large volumes||42%|
|Stirrer can't handle high viscosity fluid||55%|
|Impeller frequently becomes jammed||17%|
|Stirrer doesn't maintain speed||24%|
|Drive motor overheats||13%|
Nearly 51% of respondents are engaged in purchasing a new stirrer or mixer. The reasons for these purchases are as follows:
|Replacement of aging system||
|Addition to existing systems, increase capacity||
|Setting up a new lab||
|First time purchase||
Top 10 Features/Factors Respondents Look for When Purchasing a Stirrer or Mixer:
|Low Maintenance / Easy to Clean||79%|
|Performance of Product||78%|
|Value for Price Paid||65%|
|Low Operating Costs||63%|
|Service and Support||58%|
|Availability of Supplies and Accessories||55%|
|Total Cost of Ownership||54%|
|High Flow Rate||50%|
|Safety and Health Features||50%|
For more information on stirrers and mixers, including useful articles and a list of manufacturers, visit www.labmanager.com/stirrers-mixers