Magnetic Tumble Stirrers & Unloading Systems

     


VP 770

     
 


Magnetic stirrer pickup and magnetic unloading system including tray compatible with all magnetic replicators.

 
 
     
 
 


VP 408M

     
 


V&P Scientific Magnetic Replicators coupled with the Magnetic Stirrer Pickup and Unloading System provide a simple and efficient method of sterilely removing tumble stirrers from microplates.

The VP 770 Pickup Magnet Plate is used to stand the stirrers up on its south pole and provide the magnetic field for the Magnetic Replicators.  When the magnetic pins of the VP 408M Replicator contacts the stirrers, the stirrers attach themselves to the pins and can be lifted from the wells.

Once removed from the wells they are easily unloaded by passing over the VP 770 Unloading Magnet that has both a powerful north and south pole facing up. 

By moving the Replicator back and forth between the north and south poles the stirrers fall off the Replicator pins as they attempt to reverse polarity and are captured on a tray that sits on top of the VP 770 Unloading Magnet.  The tray is then removed and the stirrers are decanted, demagnetized (using the VP 781 Demagnetizer), washed, sterilized and reused. 
 

 

 
 

 
  Technical Documents:
    Magnetic Stirrer Loader & Unloader Manual
 

 



VP 408AM

     
 


The VP 408AM Magnetic Replicator is used to remove stirrers from deep well plates in addition to regular 96 well microplates.  The magnetic pins of the VP 408AM are 57 mm long and will touch the bottom of all deep well plates.  If you need to remove the stirrers from both deep and regular microplate just purchase the VP 408AM and it will do both jobs.
 

 
 
 
 



VP 407M

     
 


The VP 407M magnetic replicator is constructed using a more magnetic stainless steel that is also larger in diameter to increase the ability of the pin tool to lift heavier stir elements and stir elements coated with parylene or encapsulated with  PTFE especially PTFE encapsulated Stir StiXs.
 

 
 
 
 



VP 407AM

     
 


The VP 407AM magnetic replicator is also constructed using a more magnetic stainless steel that is not only larger in diameter but longer so as to reach the bottom of deep well microplates and still have the magnetic strength to lift heavier objects and magnetic objects coated with parylene or PTFE.
 

 
 
 
 



VP 407BM

     
 


The VP 407BM magnetic replicator is also constructed using a more magnetic stainless steel that is not only larger in diameter but longer so as to reach the bottom of the new 4 ml deep well microplates and still have the magnetic strength to lift heavier objects and magnetic objects coated with parylene or PTFE.
 

 
 
 

 
  Technical Documents:
    Magnetic Stirrer Loader & Unloader Manual
 

 



VP 481M

     
 


T
he VP 481M is constructed with 48 Magnetic stainless steel pins in an anodized aluminum base. Compatible with Griener ____Falcon # 3078 and Costar  48 well plates. Although designed to remove stir elements from 48 well microplates, the pins will also transfer ~1 ul liquid to liquid, and ~0.2 ul liquid to membrane (hanging drop). Pin diameter = 1.58mm, pin length = 21.8mm, center to center spacing = 13 mm

Check the center to center spacing on your plate very carefully as this varies between manufacturers.  Also the location of the matrix varies between manufacturers.  Nunc and Corning 48 well plates are on 13.5 mm centers.
 

 

 
 
 

 
  Technical Documents:
    Magnetic Stirrer Loader & Unloader Manual
 

 
 
384 Pin Magnetic Pin Replicator, pin diameter = 1.58 mm, exposed Replicator pin length = 21.9 mm VP 384M
384 Pin Magnetic Pin Replicator for deep well microplates, pin diameter = 1.58 mm, exposed Replicator pin length = 57 mm VP 384AM
96 Pin Magnetic Pin Replicator, pin diameter = 2.36 mm, exposed Replicator pin length = 21.8 mm VP 407M
96 Pin Magnetic Pin Replicator for 4 ml deep well plates, pin diameter = 2.36 mm, exposed Replicator pin length = 57 mm VP 407AM
96 Pin Magnetic Pin Replicator for 4 ml deep well plates, pin diameter = 2.36 mm, exposed Replicator pin length = 121 mm VP 407BM
96 Pin Magnetic Pin Replicator, pin diameter = 1.58 mm, exposed Replicator pin length = 21.9 mm VP 408M
96 Pin Magnetic Pin Replicator for deep well plates, pin diameter = 1.58 mm, exposed Replicator pin length = 57 mm VP 408AM
Magnetic Stirrer Pickup and Magnetic Unloading System including tray compatible with all Magnetic Replicators VP 770
Heavy Duty Magnetic Stirrer Pickup system compatible with all Magnetic Replicators, powerful enough for coated and encapsulated stirrers, Also used to load Stir StiXs.  dimensions = 21.8 cm x 16.7 cm x 4 cm VP 771
 
 
  VP 772  V&P Super Magnet Unloading System
     
 


If you have a lot of microplates that you wish to unload rapidly, we offer the V&P Super Magnet Unloading System with a magnet so strong it will remove the stirrers from 4 inches away.  Designed for laboratories who process many microplates in a day and want to remove the stirrers and recycle them in an efficient manner or for laboratories who wish to remove the stirrers and leave the liquid behind.  The advantage over the Magnetic Replicator System is twofold: first there is no Replicator to clean between microplates and secondly it is much faster.

The Super Magnetic Unloading System is very easy to operate, just place a microplate in the system and slide the magnet across the top. It is just that simple.

As the magnet slides over the microplate, the stirrers/levitation balls are pulled from the microplate and held on and moved across the ceiling of the unloader.  Once the stirrers/levitation balls reach the discard ramp/stop they are held in place while the magnet continues to move across the ceiling.  Once the magnet has moved 4 inches past the ramp/stop the stirrers drop into the discard container and the process is repeated for the next microplate.  The only disadvantage of this system is that there may be a slight amount of cross contamination of the microplate wells as the wet stirrers hit the ceiling with considerable impact.  The spray from the stirrer impact can be significantly decreased by placing an absorbent material like paper towels on the ceiling.

 

 
  NEW
  V&P Super Magnet Unloading System with Cross Contamination Control
 
 


VP 772A

     
  The VP 772A is the first in a series of non-contact magnetic stir element removal systems that has a built in Cross Contamination Control Blotting Paper with flaps and flexible tabs (VP 540C-24) .  The flexible tabs bend when a stir element strikes the flap and allows the stir element to pass through the Blotting Paper and impact on an absorbent pad below the magnet.  The tab then returns the flap to its normal horizontal position and any liquid that may be sprayed about is prevented from entering adjacent tubes or wells.

The heart of this system is a very large and powerful Rare Earth magnet that can be moved up and down the rail system.  We have incorporated a damper cylinder to facilitate moving the magnet.

Watch Video of VP 772A Unloading VP 775-12


Download video (mpeg movie- 36MB)


Press the play button to view the video in a flash format, flash must be installed, or click the download link to download a mpeg version.

 

   
 

 

The disposable VP 540C-24 at the right illustrates the flaps and the flexible tabs of the blotting paper.

 
 
 

In addition to the VP 540C-24 we also offer a similar version with 12 flaps (VP 540C-12) shown to the right.
 
 
 


Just above the slot that holds the VP 540C-24 is the impact plate that the stir elements strike.  We have incorporated an access hatch that allows us to place a disposable absorbent pad (VP 540DB1) in this area to absorb any liquid carried by the stir elements.  The height of this strike plate can be adjusted for different tube racks or microplates.

 
 
 


The system is easy to operate - just place a rack with tubes and stir elements in one position of the slider and a simple catch basin with a VP 540DB1 in the other.

 
 
 


When the magnet is lowered the stir elements are pulled through the blotting paper flaps and are held against the VP 540DB1 as shown in the photo to the right.

 
 
 


Next the VP 540C-24 Blotting Paper with flaps is removed.  The photo at the right illustrates the stir elements held against the VP 540DB1.  The catch basin is moved into place and the Magnet is raised up and the stir elements fall into the catch basin.

 
 
 

 
  Technical Documents:
    Care & Use of VP 722A Super Unloader
 

 


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