question: sensitive device to measure very small changes in

B

Brother Numzi

Guest
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 :eek:)
 
"Brother Numzi" <Numzi@hutmeil.comeon> wrote in message
news:42e2bf44$0$78285$157c6196@dreader1.cybercity.dk...
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 :eek:)
Click to expand...
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.
 
Brother Numzi wrote:
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 :eek:)



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

--
The e-mail address in our reply-to line is reversed in an attempt to
minimize spam. Our true address is of the form che...@prodigy.net.
 
On Sun, 24 Jul 2005 00:06:07 +0200, "Brother Numzi"
<Numzi@hutmeil.comeon> wrote:

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?
Click to expand...
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.

--
Rich Webb Norfolk, VA
 
"Rich Webb" <bbew.ar@mapson.nozirev.ten> wrote in message
news:7eo5e1t7gh7piupti16188ndbhnun0sjhq@4ax.com...
On Sun, 24 Jul 2005 00:06:07 +0200, "Brother Numzi"
Numzi@hutmeil.comeon> wrote:

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?

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.
Click to expand...
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. ;-)


--
Rich Webb Norfolk, VA
Click to expand...
 
"Brother Numzi" <Numzi@hutmeil.comeon> wrote in message
news:42e2bf44$0$78285$157c6196@dreader1.cybercity.dk...
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 :eek:)


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

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.
 
On Sun, 24 Jul 2005 11:54:28 -0700, "Watson A.Name - \"Watt Sun, the
Dark Remover\"" <NOSPAM@dslextreme.com> wrote:

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

--
Rich Webb Norfolk, VA
 
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