Wednesday, 9 November 2011

Magnetic Stirring Vessel

Magnetic Stirring Vessels or Magnetic stirrers are one of the most used magnetic mixer in pharmaceutical industry. The mixing equipment consists of an impeller, bearing, welding plate, drive unit and control box for efficient and high quality mixing of raw material and particles.
A magnetic stirrer consists of a small bar magnet, also known as stir bar; this plastic coated bar magnet is placed in a vessel for efficiently stirring liquids. The rapidly rotating magnetic field causes the bar magnet to spin at a high speed. Magnetic stirring vessels are preferred over motor driven stirrers as they are more efficient, have no moving parts that break down or wear out and are quieter. Being small in size, these stirrers are easy to maintain, clean and sterilize than other devices. As opposed to the motor driven stirrers, magnetic stirrers do not contaminate the vessel as they do not use any lubricants.

How Magnetic stirrer works:
The bar magnet is placed in a vessel containing liquid which is to be stirred. At the top of the stand, vessel is set in such a way, where the rapidly rotating magnetic field causes the bar magnet to rotate, which finally results in the stirring of the liquid. Because of its small size magnetic stirrer, this device is preferred in laboratory experiments.
Following types of magnetic stirrer are found in pharmaceutical industry:
  • Air Operated Turbine Magnetic Stirrer
  • Heavy-Duty Magnetic Stirrers
  • Magnetic Stirrer with Timer
  • Magnetic Mini Stirrer
Application of Magnetic Stirring Vessel:
  • Pharmaceutical
  • Chemical
  • Cosmetic
  • Magnetic stirrer is used in lab to work with different solutions.
  • The stirrers are beneficial to scientists.