Keep my session open?
Ending In 
The session is expired
Your session has expired. For your security, we have logged you out.
Would you like to log in again?

Variable Gap Magnet

Avg. Ratings: 5.0 (1 Review)

Adjust the Magnets According To Your Needs.

  • This apparatus consists of two neodymium magnets set on screws on a metal base
  • Versatile and customizable, the magnet positions can be altered between 3 mm and 83 mm or removed to implement other magnets
  • A pair of metal plates are included to provide a uniform magnetic field when performing experiments

   
 

ORDER

Item # Description Unit Availability Price Quantity
470121-488 Variable Gap Magnet
Each Retrieving

WRITE A REVIEW

Need help?

  • Whatever you have to say, positive or negative, is important to us.
  • Providing feedback takes only seconds.
  • Your feedback will be made available to the public on the web.

SARGENTWELCH.com will publish your name as sargentwelch.com user.
You can use this name, or edit and save a nickname.
We recommend authors use their first and last initial.

Please confirm your profession

Example: Education

Please confirm your role

Example: Teacher

Please confirm your location

Example: New York, NY

REVIEWS (1)

Total Ratings: 1
Avg. Ratings: 5.0 out of 5

Sort all by:

Was this review helpful? Yes No
Yes: 0 No: 0 
sargentwelch.com user Retired Scientist  / Experimenter / Bennington, NY
Yes, I recommend
This variable gap magnet is an excellent value. The magnetic field strength at the 20 mm magnet surface is 3950 G and IMO are an N38-N42 grade magnets. I measured the field strength at the center of the gap with a magnetometer for different gaps. The following is the result: 1.8 mm 9460 G 3.3 mm 8180 G 6.3 mm 6650 G 9.2 mm 5300 G 11.5 mm 4500 G 13.4 mm 4000 G 18 mm 2750 G 26.3 mm 1550 G 34 mm 975 G 44.3 mm 580 G 54.3 mm 378 G 69.7 mm 212 G 84.8 mm 121 G IMO if the magnets were changed to N52 grade it should be possible to exceed 10000 G (1 Tesla), not bad for a low cost variable gap magnet. The current magnets seem to be attached to the steel (iron?) screws with epoxy or some other glue. Changing out magnets may be difficult. Turning the gap screws when the gap is small requires some force that is hard on the fingers. To help minimize that force I put some grease on the threads to make turning the gap screws easier.
Reply
SARGENTWELCH.com associate Published 06/29/2016
Thank you!
 
Review & Compare Alternatives
We found alternative products that can save you up to  per item-unit.  To compare product details, select up to 3 alternatives below and click Compare Selected. To add items to your basket, enter a quantity and click Add to Basket.

Original Product:

Description Catalog Number Availability Unit Your Price Price Per Qty