What is the purpose of using a magnetic stir bar and plate?
What is the purpose of using a magnetic stir bar and plate?
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 does a magnetic stir plate 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.
What is the best hot plate magnetic stirrer?
Best Hot Plate Stirrer – Top Product for Scientific Research
- IKA 3368001 Topolino Magnetic Stirrer.
- 110V/50Hz 78-1 Magnetism Stirrer.
- SH-2 Hot Plate Magnetic Stirrer Mixer.
- Scilogex 81112102 MS-H-S Analog Magnetic Hotplate.
- Fristaden Lab SH-2 Magnetic Stirrer Hot Plate.
What is a magnetic stirrer called?
A magnetic stirrer or magnetic mixer is a laboratory device that employs a rotating magnetic field to cause a stir bar (also called “flea”) immersed in a liquid to spin very quickly, thus stirring it.
What size magnetic stir bar should I use?
The Size of the Internal Drive Magnet The size of the magnet inside the stirrer, which may be referred to as the drive magnet, is of great importance when choosing a stir bar size. The length of the bar should be about equal to the magnet size to avoid spinout.
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.
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 does a stir bar work?
A separate magnet (or magnets) is placed underneath the container, so that it attracts to the stir bar magnet. The lower magnet is usually attached to a motor that spins it. If the magnets are close enough, the stir bar magnet spins inside the container.
Why is a magnetic stirrer better?
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.
What is a spinbar?
These egg-shaped stirring bars are designed especially for use in round-bottom vessels as they spin unrestricted by the vessel contour. Particularly well suited for round bottom flasks; shape ensures complete mixing Offers minimal contact when used in plastic containers Egg shape…
How do I choose a magnetic stir bar?
How do you store a magnetic stir bar?
First, stir bars should be stored in pairs to maintain magnetic strength. Stir bars should not be stored in a random mass or dropped on a hard surface especially steel.
How do you use a magnetic stir plate for a yeast starter?
Place the starter (with the stir bar) on top of the stir plate. Slide the container around a little to make sure the magnet is holding the stir bar. Turn the potentiometer to its lowest setting and turn the power on. Slowly turn up the potentiometer until the stir bar is moving and creating a vortex in the starter.
Does a magnetic stirrer work?
The primary use of magnetic stirrer or hot plate with magnetic stirrer is to conduct biological and chemical experiments by mixing two components. It is equally suitable for solids or liquid samples to obtain a consistent liquid mixture. Examples include media for bacterial growth and chemical synthesis.
What are the two types of stirrer?
A Guide to Different Types of Stirrers
- Magnetic Stirrers. Magnetic stirrers use a rotating magnetic field to cause a stirrer bar (of flea), immersed within a liquid, to spin and therefore stir.
- Stirrer Hotplates.
- Aluminium.
- Paddle.
- Centrifugal.
- Turbine.
- Dissolver.
- Propeller.
Can you autoclave magnetic stir bars?
Fisherbrand™ Azlon™ Micro Magnetic Stirrer Bars are ideal for small vessels, test tubes and vials. Provides stable stirring action. These PTFE magnetic stir bars are autoclavable and include a pivot ring.
What is a multi-position magnetic stirrer?
These multi-position magnetic stirrers feature powerful magnets and precise speed control for finely reproducible performance. Large top plates with position indicators are easy to clean and provide a white reflective surface, and can accommodate a number of stirring vessels simultaneously.
What is a five position magnetic stirrer?
Description: The five position magnetic stirrer is a rugged design for 24/7 laboratory or production applications. It is ideal for CO 2 incubators with a… Description: Digital, front-end, magnetic stirrers are designed for both cell culture in spinner flasks as well as general laboratory procedures requiring the use
How many stirring points are there in a magnetic stirrer?
Our multi-point magnetic stirrers are available with 4, 6, 15 or 60 stirring points with good speed control to meet various needs in all labs. They are applicable in different operating conditions such as daily lab use, water baths and CO 2 incubators.
How many vessels can a slow speed stirrer hold?
Description: This Corning® four position slow-speed stirrer has integral controls that can accommodate up to four one-liter vessels. Description: Stirrers are 100% maintenance and wear free, in a fully synchronized multipoint platform ideal to conduct stirring applications.
