Gauss Meter

[KinnyP]

Hi Guy’s,

I have constructed my own shape of coil using the inner workings of a Coiltek 14” round mono. It works well except for one sensitive area (hot spot). It is time to carry this project to the next level and need a little help. I have gathered all the materials needed to build several coils for testing. I would like to be able to test the coil bundle shapes as I go. I have an oscilloscope at my disposal and have purchased an LCR meter (thanks to SimonBaker) now would like to buy a not too inexpensive Gauss meter. I tried looking on e-bay and have no idea what to buy. What I need to know before purchasing is the range the meter I buy should have? i.e.
Milligauss .001/.999
10’s 10/99
100’s 0/999
1,000’s 1000/9,999

Any help would be appreciated. KinnyP

[gwzd]

I don't know if this is of any help to you, but check out page 69 in the attached PDF file. It's a magnetic-field probe with minimum components. I build it just out of curiosity and it was OK for relative measurements on several coils with a 10kHz signal. I don't think you should trust the absolute measurements unless you buy a calibrated sensor, but for finding spots in your devices it might be all you need.
Regards,

[KinnyP]

Hi gwzd,

I appreciate your help to my question. I think at this point in time I best stick with a store bought tester. I probably have a dozen coils at my disposal for testing. I am not interested in absolute measurements, only the approximate differences from coil to coil. The coil I made works really well for a first attempt and I’m hopping to improve on it. Reading between the lines I see your recommendation works well with 10 kHz signals. Would you say that is about the middle range for coils used on a PI detector? Thanks again, all help is appreciated. Kinny