Table of Contents
What are the types of magnetic stirrer?
Types of a Magnetic Stirrer:
- Magnetic Mini Stirrer:
- Magnetic Stirrer with Timer:
- Heavy-Duty Magnetic Stirrer:
- Battery Powered Magnetic Stirrer:
- Air Operated Turbine Magnetic Stirrer:
What is the purpose of a stir bar?
A stir bar, or spin bar, is a small white oblong Teflon-covered magnet. These bars have only one purpose: to stir solutions. They are used in conjunction with a stir motor. You place the stir bar in a container of liquid, then place the container over a stir motor.
Which mixing equipment is used in stir method?
Magnetic stirrer
| A stir bar mixing a solution on a combined hot-plate magnetic-stirrer device; the left knob controls the stirring rate and the right knob controls heating | |
|---|---|
| Other names | Magnetic mixer |
| Uses | Liquid mixing |
| Inventor | Arthur Rosinger |
| Related items | Vortex mixer, static mixer |
How much does a magnetic stirrer cost?
However, one magnetic stirrer that can accommodate 1-L volumes costs around US$160; one with a heating function costs around US$500.
How do magnetic stir plates work?
Magnetic stirrers use a rotating magnetic field to move a stir bar around in liquid samples. The movement of this stir bar mixes the sample thoroughly with rapid movement and agitation. The speed of the magnetic field is controlled by the user, so it can be customized to the specific sample that’s being stirred.
How do you size an agitator?
Agitator speed is then determined using relation Nq = Q/ND3, where N is the Agitator speed. Reynolds number is calculated using relation, Re = D2Nρ/μ and a new Pumping number is determined using generic agitator curves.
How do I choose an agitator?
The selection of agitators for a particular application depends on various factors like:
- The phase to be mixed (single-phase or multiphase).
- The viscosity of the bulk.
- Exact function required (blending, dissolving, dispersion, heat exchange, chemical reaction, crystallization, emulsification, suspension, etc).
How does a magnetic stir plate work?
Why do we use magnetic stirrer?
Magnetic stirrers are silent and provide the possibility of stirring closed systems without the need for isolation, as in the case with mechanical agitators. Because of their size, stir bars can be cleaned and sterilized more easily than other devices such as stirring rods.