| Author | Message | ||
     iansmith Unregistered guest |
I have some Hall-Effect devices which can give me a Gauss mesaurment of up to about 400 Gauss. That is way lower that most of the NiB magnets I have (some of which I bought from Science Toys) so I am doing this to get the measurment. I try and take a reading at the surface of the magnet. If that fails, I move it away from the sensor equal to half the thickness of the magnet. If I get a reading, I multiply it by 8. If not, I double the distance and mutiply by 8*8. So If I am measuring a 1" thick magnet and place the center of the magnet 2" away from the sensor and get 360 Gauss, the means at the surface it should be around 360*8*8 = 23000 Gauss? When you move a magnet "twice as far away" to decrease the field by 8x, that means the CENTER of the magnet gets moved twice as far away, not the surface? A little confused.. thanks! :-) http://www.ian.org/Magnetics/ | ||
| Simon Quellen Field (sfield) Senior Member Username: sfield Post Number: 299 Registered: 12-2004 |
The distance is to the face, not the center. | ||
| Phil Reinhardt (Reachphilrmsncom) New member Username: Reachphilrmsncom Post Number: 1 Registered: 8-2005 |
If I roll asheet magnet into a tube how will the gauss be affected at the inner surface of the tube??? |
