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Measuring relatively high static and pulsed magnetic fields

Measuring relatively high static and pulsed magnetic fields

Measuring relatively high static and pulsed magnetic fields

(OP)
I checked the forum as best as I could before posting to make sure that I'm not re-asking a common question, though please forgive me if this has been answered in another post.

I have some experience in using linear Hall Effect transducers; however the ones that I used could only measure field strengths of up 700 Gauss. I am working with some dipole magnets, one of which that will have a maximum flux density in the air gap between the pole tips of close to 1.6T, (calculated with FEMM) as well as a pulsed solenoid that was calculated to have a maximum flux density of about 1T if I remember correctly.

I would either like to find a relatively inexpensive Hall probe that can measure these fields or perhaps someone can point me to a supplier for Hall Effect transducers that can actually measure up to 2 or 3 Tesla? Or alternatively, is there another type of magnetic field sensor that I should look into, and if so what is it and where would I get it?

Thanks,

Rob

RE: Measuring relatively high static and pulsed magnetic fields

There are a number of Hall Effect sensors/chips that can interface with Arduino boards. You may want to look into them.

For the pulsed field measurement, you may be better served with a search coil. Hall effect sensors might not react fast enough for your pulse.

RE: Measuring relatively high static and pulsed magnetic fields

Given that flux gates have, over the years, improved to their current performance, one would think that one could build a poor;y performing flux gate.

TTFN
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RE: Measuring relatively high static and pulsed magnetic fields

(OP)
MagMike:

But can these particular Hall Sensors that can interface with an arduino measure up past 2 Tesla? Also the speed of most Hall sensors I think should be ok for my purposes since the high inductance of the magnet windings should cause the current pulse in the magnet to rise slowly enough for a Hall sensor to pick it up without too much difficulty.

However, do you have any recommendations on where to learn more about search coils?

IRstuff:

Aren't flux gates used typically for more low field sensing, when you also need to know the field direction?

RE: Measuring relatively high static and pulsed magnetic fields

Even a Hall effect sensor is directionally sensitive. In order to "measure" total field, 3 orthogonal sensors are used, and the total field is the root of the sum of the squares of the 3 measured components.

There are commercially available instruments: http://www.lakeshore.com/products/gaussmeters/mode... you could possibly build something that could read one of the probes that LAkeshore makes, but, aside from the engineering complexity is the calibration complexity.

TTFN
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RE: Measuring relatively high static and pulsed magnetic fields

HI ROB

Try using AD22151 or MLX90217 for linear output. These Hall sensor can measure a field upto 2T. kindly refer the datasheet

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