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Calibrating a Hall Probe

  1. May 18, 2005 #1
    Hi there! Im have to plan an investigation. I have to calibrate a Hall probe to measure magnetic flux density and then investigate how the separation between two bar magnets has an effect on the magnetic flux density.

    Can anyone help with calibrating a hall probe? I have searched the net and text books but they all tell you about the Hall effect and not a steo by step calibration method.

    Also how can I be sure I am keeping the Hall probe directly between two bar magents? do I need a guide, or hover over a ruler to measure the distance (making sure Im exactly half way between two mountd bar magnets)

    PLEASE HELP!!!!!!!!!1

    Im so stuck and any help would be sooo appreciated.

    Thanks guys

    XXXXX :confused:
  2. jcsd
  3. May 18, 2005 #2


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    Look at some of the threads here : https://www.physicsforums.com/search.php?searchid=175889 [Broken]

    Specifically, see : https://www.physicsforums.com/showthread.php?t=70290&highlight=hall+probe

    As for the measurement, find some way to position the magnets collinearly and then, you could either build a guide (with graduations on it) or simply use a ruler to define the midpoint. Just make sure all parts of the apparatus are non-magnetic (skip iron and steel things).
    Last edited by a moderator: May 2, 2017
  4. May 18, 2005 #3
    Thank you for your speedy reply!

    I think I checked out a forum, maybe it wad that one. Just one thing, if you're still online, when they say place the probe in a known field, how do know the field?!?! Im gettin my headin a muddle haha The graph for calibration is B against V yeh? Well you measure V on the voltmeter but how do you know B???

    Thank you again
  5. May 18, 2005 #4
    Even though I haven't read the other forums, I would suggest a Helmholtz coil. Check out this page on how the Helmholtz coil pair works.
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