Magnetic Stainless Steel Levitation Stir Balls & Dispenser
 
 


We offer a variety of different diameter stainless steel corrosion resistant magnetic levitation balls which have been tested and selected on the basis of maximum magnetic characteristics, cleaned and degreased. We recommend the 2.38 mm diameter balls for the Polyfiltronics (now Whatman) 384 deep well microplates (VP 725), 3.97 mm diameter balls (VP 725E) for round 96 deep well microplates and 4.76 mm diameter balls (VP 725F) for the larger square 96 deep well microplates. We can provide balls of other diameters to function with your particular needs on a custom basis.  The VP 725G and VP 725G-2 are examples of larger diameter (5.56 and 5.57 mm diameter) custom balls we have provided customers.  The VP 725G-2 are custom PTFE dipped and baked balls. 

 

The above balls are also available with a parylene coat  ~50 microns thick -VP 725-1, VP 725E-1, VP 725F-1) to prevent metal ions from entering the reaction mixture.  Parylene is an inert plastic polymer similar to teflon.   This is especially useful for those applications (combinatorial chemistry) where Fe molecules may interfere with the reaction, or the stirrers would be attacked by strong acids or bases.  Parylene (Di-Para-Xylene) is deposited on the surface of the stirrer in a very uniform 0.05 mm thick layer, thus protecting the stirrers from strong acids and bases.  Parylene coated stirrers can be autoclaved or sterilized in hot air ovens without harming the conformal coating.  Parylene can be heated to 200C without harming the surface.  Parylene is also compatible with biological applications.  In fact, parylene is used to coat materials for implant procedures, as it is completely non-toxic to tissues.  A very complete discussion of parylene's barrier characteristics, properties and methods of deposition is found at this hyperlink.  Another page is dedicated to parylene's resistance to organic solvents, acids and bases.

Parylene Coated Balls all VP part numbers for stir balls that are followed by a "-1" represent the parylene coated version of that ball

Sterile Balls all VP part numbers for stir balls that are followed by a "S" represent a sterile version of that ball. Sterile balls are provided in pyrex bottles.

The balls are priced low enough to be disposable, however they can be reclaimed, cleaned, autoclaved and then reused.  Recycled Levitation Stir Balls - 2.38mm diameter, for 384 deep well plates, sterile, 50,000/bottle.....VP 725RS

All of the above balls come in sterile pyrex bottles in quantities of 1000. See table at bottom of webpage.

Click here for a list of published articles that cite the products on this page.

 
 
         
 

VP 725PS

     
 

Stir Ball, 12mm diameter sphere, PTFE Encapsulated 6mm long x 6mm diameter cylinder Alnico Magnet, 5.5MGO, 10/pkg

   
 



Autoclaveable Flip Dispensers

     
 


Flip dispensers to load the balls into each of the deep well microplates are available. These dispensers are easily filled by pouring an excess of balls into the dispenser, rocking it several times to fill the holes and pouring off the excess balls.  Next, an empty microplate is placed on top of the dispenser and the dispenser and the microplate are "flipped" over and the balls drop into the microplate wells. 

 
 
 


Flip loads the VP 725, VP 725S, VP 725-1 and VP 725-1S Levitation Balls into 384 deep well microplates.....VP 725B

Flip loads the VP 725, VP 725S, VP 725-1 and VP 725-1S Leviation Balls into 96 well microplates......VP 725B-96

Flip loads the VP 725E, VP 725ES, VP 725E-1 and VP 725E-1S Levitation Balls into 96 deep well microplates.....VP 725EB

Flip loads the VP 725F, VP 725FS-1, VP 725F-1, VP 725F-1S, VP 725G and VP 725G-2  Levitation Balls into 96 deep well microplates.....VP 725FB

Flip loads the VP 725F, VP 725FS-1, VP 725F-1, VP 725F-1S, VP 725G and VP 725G-2  Levitation Balls into 48 deep well microplates.....VP 725FB-48DW

 

 
 

 
  Technical Documents:
    Levitation Stir Ball Flip Dispenser Manual
 

 



Plastic Drop Dispensers

     
 


Drop Dispensers To Load The Levitation Balls Into 96 And 384 Deep Well Microplates

Drop loads the VP 725, VP 725S, VP 725-1 and VP 725-1S Levitation Balls into 384 deep well microplates.....VP 725A

Drop loads the VP 725, VP 725S, VP 725-1 and VP 725-1S Levitation Balls into 96 deep well microplates.....VP 725A-1-96S

Drop loads the VP 725E, VP 725ES, VP 725E-1 and VP 725E-1S Levitation Balls into 96 deep well microplates.....VP 725EA

Drop loads the VP 725F, VP 725FS-1, VP 725F-1 and VP 725F-1S Levitation Balls into 96 deep well microplates.....VP 725FA 
 

 

 
 

 
  Technical Documents:
    Levitation Stir Ball Flip Dispenser Manual
 


Registration Collar - VP 725A-1-96SC

     
 
Registration collar for VP 725A-1-96S Stir Ball Dispenser. Aligns dispenser to a 96-vial Symyx rack (SBS footprint) with 8mm OD x 40mm height glass vials. Also aligns to similar aluminum rack available from V&P VP 416ALB-96 for use in Heat Blocks.

Can also be used with Tumble Stir Element Dispensers.

Not for use with Autoclaveable Tumble Stir Element Drop Dispensers or Sitr Stix Dispensers.
 
 
     
 
     
 
 


Double Drop Dispenser - VP 725EA-48-1

     
 
Drop loads 1 or 2 balls at a time into 48 well microplates.  The dispenser will handle VP 725E, VP 725ES, VP 725E-1 and VP 725E-1S Stir Balls.
 
 
     
 
     
 
 



Autoclaveable Drop Dispensers - Series D

     
 


New Autoclaveable Drop Dispensers (VP 725D & VP 725FD) can drop load the balls into each of the deep well microplates.  These dispensers are made from aluminum and have a ball hopper that holds extra balls.  The ball hopper feature has the advantage of filling 5 microplates before the hopper has to be reloaded with balls.  This capability significantly speeds the loading process.  In addition to these advantages, drop loading of sterile balls is an essential process in many stirring procedures.

Drop loads the VP 725, VP 725S, VP 725-1 and VP 725S-1 Levitation Balls into 384 deep well microplates.....VP 725D

Drop loads the VP 725E, VP 725ES,  VP 725E-1, VP 725E-1S, VP 725F, VP 725FS-1, VP 725F-1 and VP 725F-1S Levitation Balls into 96 deep well microplates.....VP 725FD

Click here to watch a video of how to use our autoclaveable drop dispensers.
 

 

 
 
 



Choice Of Dispenser

     
 


The choice to use Flip, Plastic Drop or Aluminum Drop Dispensers is determined by three factors:

  1. Cost
  2. Sterility
  3. When the stir ball can be added to the plate

Some stirring processes/protocols dictate that the balls can only be added after liquid is added to the wells. In those cases the drop dispensers must be used. 

If the process is done sterilely than either the Flip Dispensers or the Aluminum Drop Dispensers must be used. 

The Flip Dispensers are less expensive but they can only be used to place the balls in the wells when there is no liquid in the wells.  The Flip Dispenser operates by filling the depressions in the dispenser with balls, then placing a deep well plate upside down on the dispenser and "flipping" the dispenser over allowing the balls to fall into the wells.  Whereas a Drop Dispenser can "drop" the balls into wells that already contain liquid. 

The Plastic Drop Dispensers cannot be autoclaved but they can be disinfected with bleach and or ETOH.  They are less expensive than the Aluminum Drop Dispensers. 

The Aluminum Drop Dispensers can be sterilized by autoclave or in a hot air oven.  They also have the advantage of a levitation ball hopper that will hold enough balls to fill 5 microplates thus facilitating the loading process.

 
 
 



  Automatic Levitation Ball Loader

     
 


VP 725C

     
 


The latest in the line of Ball Drop Dispensers is the Semi Automatic Levitation Ball Loader (VP 725C). The Semi Automatic Levitation Ball Loader can fill 400 microplates with sterile balls in an hour.  All you need is an operator to feed the microplates to the loader.  With the push of a button, in 7 seconds the microplate is loaded with sterile levitation balls using a system of pneumatic cylinders. This system is ideal for laboratories that wish to mix large numbers of microplates. 

The Semi Automatic Levitation Ball Loader comes in three models to dispense all three sizes of Levitation Balls, 2.38 mm (VP 725C), 3.97 mm (VP 725EC) and 4.76 mm (VP 725FC).


Download Video of VP 725C in action
(mpeg movie- 1.1MB)

 

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.

 




 

 


VP 725C-96

     
 
The VP 725C-96 is similar to the VP 725C except the VP 725C-96 loads VP 725, VP 725S, VP 725-1 or VP 725-1S balls in 96 well plates instead of 384 well microplates.
 


Download Video of VP 725C-96 in action
(mpeg movie- 16.5MB)

 

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.

 
 
         
   
Levitation Stir Ball, 2.38 mm diameter for 384 well plates, 1000/pkg VP 725
Levitation Stir Ball, 2.38 mm diameter for 384 well plates, parylene coated, 1000/pkg VP 725-1
Sterile parylene coated VP 725 Levitation Stir Balls - 2.47mm diameter - 1000/pkg VP 725-1S
Sterile parylene coated VP 725 Levitation Stir Balls - 2.47mm diameter for 384 deep well plates - 5,000/bottle VP 725-1S-5
Sterile parylene coated VP 725 Levitation Stir Balls - 2.47mm diameter- 9000/bottle VP 725-1S-9
Levitation Stir Ball, 2.38 mm diameter for 384 well plates, parylene coated, 40,000/btl VP 725-1-40
Levitation Stir Ball, 2.38 mm diameter for 384 well plates, parylene coated, sterile, 40,000/btl VP 725-1S-40
Drop Dispenser that loads VP 725, VP 725S, VP 725-1 and VP 725-1S balls into 384 deep well microplates VP 725A
Drop Dispenser that loads VP 725, VP 725S, VP 725-1 and VP 725-1S balls into 96 deep well microplates VP 725A-1-96
Drop Dispenser - 96 Holes - Loads 0.097" Dia. Balls Into Standard Well 96 Microplates, New Design - Top Plate Stationary - Bottom Plate Moves VP 725A-1-96S
Polypropylene Collar To Register VP 725A-1-96S To 96 Tube Block VP 725A-1-96SC
Drop Dispenser - 96 Holes - Loads Two 2.48mm Diameter Balls, Either VP 725, VP 725S, VP 725-1 And VP 725-1S Into 96 Well Microplates VP 725A-2-96S
Flip Dispenser that loads VP 725, VP 725S, VP 725-1 and VP 725-1S balls into 384 deep well microplates VP 725B
Autoclavable Flip Dispenser - Loads 96 Well Microplates - 2.47mm Diameter Balls Load Into Array Of 8 x 12 On 9mm Centers VP 725B-96
Autoclavable high volume semi-automatic Drop Dispenser that  loads VP 725, VP 725S, VP 725-1 and VP 725-1S balls into 384 deep well microplates VP 725C
Autoclaveable high volume semi-automatic Drop Dispenser that  loads VP 725, VP 725S, VP 725-1 and VP 725-1S balls into 96 deep well microplates VP 725C-96
Autoclavable Drop Dispenser that loads VP 725, VP 725S, VP 725-1 and VP 725-1S balls into 384 deep well microplates VP 725D
Levitation Stir Ball, 3.97 mm diameter.. for 96 round deep well plates, 1000/pkg VP 725E
Levitation Stir Ball, 4.06 mm diameter.. for round 96 deep well plates, parylene coated, 1000/pkg VP 725E-1
Levitation Stir Ball, 4.06 mm diameter.. for round 96 deep well plates, parylene coated, sterile, 1000/bottle VP 725E-1S
Drop Dispenser that loads VP 725E, VP 725ES, VP 725E-1 and VP 725-E1S balls into 96 deep well microplates VP 725EA
Flip Dispenser that loads VP 725E, VP 725ES, VP 725E-1 and VP 725-E1S balls into 96 deep well microplates VP 725EB
Autoclavable high volume semi-automatic Drop Dispenser that  loads VP 725E, VP 725ES, VP 725E-1 and VP 725-E1S balls into 96 deep well microplates VP 725EC
Levitation Stir Ball, 3.97 mm diameter for 96 round deep well plates, sterile, 1000/bottle VP 725ES
Levitation Stir Ball, 4.76 mm diameter for square 96 deep well plates, 1000/pkg VP 725F
Levitation Stir Ball, 4.85 mm diameter for square 96 deep well plates, parylene coated, 1000/pkg VP 725F-1
Sterile Parylene Coated Levitation Stir Balls, 4.85mm Diameter For Square 96 Well Plates, 1,000/Bottle VP 725F-1-1S
Levitation Stir Ball, 4.85 mm diameter for square 96 deep well plates, parylene coated, sterile, 10000/bottle VP 725F-1S
Drop Dispenser that loads VP 725F, VP 725FS-1, VP 725F-1 and VP 725-F1S balls into 96 deep well microplates VP 725FA
Flip Dispenser that loads VP 725F, VP 725FS-1, VP 725F-1, VP 725-F1S, VP 725G and VP 725G-2 balls into 96 deep well microplates VP 725FB
Autoclavable high volume semi-automatic Drop Dispenser that  loads VP 725F, VP 725FS-1, VP 725F-1, VP 725-F1S, VP 725G and VP 725G-2 balls into 96 deep well microplates VP 725FC
Autoclavable Drop Dispenser that loads VP 725E, VP 725ES, VP 725E-1, VP 725-E1S,  VP 725F, VP 725FS-1, VP 725F-1 and VP 725-F1S balls into 96 deep well microplates VP 725FD
Levitation Stir Ball, 4.76 mm diameter for square 96 deep well plates, sterile, 5000/bottle VP 725FS-1
Levitation stir ball, - 5.56mm diameter for square 96 well plates, 1000/PKG VP 725G
Levitation stir ball, - 5.57mm diameter for square 96 well plates, PTFE dipped 100/PKG VP 725G-2
Levitation Stir Balls - 6.34mm diameter for 96 well plates - 1000/pkg VP 725H
Levitation Stir Balls - 3.175mm diameter S/S Ball Coated with a layer of parylene C 0.105mm thick - final ball diameter = 3.28mm VP 725H-1
Sterile parylene coated Stainless Steel Stir Balls - 6.45mm diameter - 1000/pkg VP 725I-1S
Recycled Sterile Levitation Stir Balls - 2.38mm diameter for 384 deep well plates - 50,000/bottle VP 725RS
Levitation Stir Ball, 2.38 mm diameter for 384 deep well plates, sterile,10,000/bottle VP 725S
 
 
Click here for a list of published articles that cite using the products on this page.
 
         

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