question: sensitive device to measure very small changes in electrical/magnetic fields?

Hello

I am looking for some equipment that is _very_ sensitive and is capable of measuring _very_ small changes in electrical fields and magnetic fields? The device must be able to record the measurements real time.

What should I be looking for?

Thanks :o)

Reply to
Brother Numzi
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capable of

fields? The

Well, if you don't know which field you want, then how are we supposed to know? Try a ferrite rod with several thousand turns of fine wire on it, and plug it into the mic input of an audio amp.

Reply to
Watson A.Name - "Watt Sun, th

For a moment there, I thought you were looking for a mirror galvanometer, but maybe not, since you don't seem to be interested in currents as much as fields.

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Reply to
CJT

Small changes in large fields? Small changes in small fields? Both electrical and magnetic fields, simultaneously, or would one or the other be sufficient? What changes; intensity, polarization, direction, or ...? Record to what precision? Record with what accuracy? Calibrated or just "as built?" Is it sufficient if the measurements are time stamped and spooled to permanent media or must they be streamed? Should "real time" be synced to the UTC(USNO) master clock (how closely?) or is a precision delta-time sufficient? What sample rate? What is your budget? Does the device need to be UL/FCC/EC/etc. approved? One-off benchtop for curiosity or to gather data for peer reviewed publication?

Numbers.

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Rich Webb   Norfolk, VA
Reply to
Rich Webb

capable of

fields? The

Calibrated

Should

is

publication?

Rich, you need to make up a standard geek form for this kind of thing. Like

Small changes in: [ ] large fields [ ] small fields [ ] Both

[ ] magnetic field [ ] electric field [ ] simultaneous

Etc..

Don't forget to include your standard rates for customers. ;-)

Reply to
Watson A.Name - "Watt Sun, th

I two wood like a sensitive peace of mesurment device that due these things.

Should have a frequency range from 0.01Hz to 453GHz +/- 0.004dB linearity.

Sensitivity for field strength needs to be at least 2.2femtoV/kM.

Reply to
Keyser Soze

Hmmm... probably should inlude a discount for anybody that still remembers (and uses) usenet. '-)

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Rich Webb   Norfolk, VA
Reply to
Rich Webb

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