Hi: It would be handy to have a box that would shield it's contents from the Earth's magnetic field. Only needs to be a few inches cube. Where can these be...
... Well, probably the cheapest solution is to solder some copper clad PCB boards together. Another possibility would be regular aluminium sheet boxes or...
... Copper PCB would not provide very much *magnetic* shielding. The usual fallbacks are: 1) mu-metal (not perfect, but better than copper, expensive,...
... Have you searched the web using "magnetic shield"? Basically you need build the box with something that will shunt the magnetic field lines through the box...
Magnetic Shield Corporation sells sheets of thin mu-metal to form your own zero gauss chambers. Otherwise you may find a nickel-plated water pitcher or coffee...
Hi Doug! ... Yeah, you're absolutely right. Sorry, was not reading carefully enough. Brooke, why do you need to shield your equipment from Earth's mag. field ?...
Hi Hannes: I'm experimenting with MR bridge sensors and would like a simple way to null the bridge with a shunt resistor (or maybe 2 shunt resistors). This...
Cast iron pipe is a pretty good magnetic shield-esp. of you have some short lengths laying around. JN ... __________________________________ Yahoo! Mail - PC...
Hi Brooke, For a cheap and dirty try, consider a large tin can such as a biscuit tin, important - that is tinned steel not aluminium. The can may have its own...
OK, given that a metal box may have it's own residual magnetism, the next thought would be to degauss the box. I've got a small degaussing coil used for...
Hi John: I've tried a steel type candy box, Litchi nut can (tin plated on inside) and a Hammond die cast (Zinc?) metal box, no luck any of them when used ...
Hi John, ... field also? Mumetal is what is called magnetically 'soft'. that is it dos not retain its magnetism. Unfortunately 'soft iron' which also does not...
GW3HWR@...
Oct 8, 2005 12:23 pm
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Hi: An update on the two cans. They are NOT working. What was happening was the the Chowder can was magnetized and with a polarity to drive the sensor output...
Hi: Is there a way to buy the Philips KMZ51 MR sensor in less than full reel of 1,000? I've learned how to make them work, but so far have not been able to...
... Hi Brooke! I got mine from Germany: http://www.segor.de/ See: http://www.segor.de/L1Versand/internate.shtml (this is the only english page; their email:...
Hi: I'm been trying the FGM-3 and find that the current draw changes with mag field. 10 ma corresponds to about 40 kHz and 16 ma corresponds to about 140 kHz....
Hello I am a physics teacher from India. I am looking for a magnetometer for measuring magnetic fields in the range 10 to 100 micro Tesla for physics...
Dear K Sakhivel I congratute you for the right choice sensor. I built mine own from Honeywell company USA this year just type Honeywell company on the yahoo...
Hi: When the FGM-3 is driven by a 12 ma current source the voltage across the power supply pins is a function of the mag field. 3.77 V @ 134 kHz & 5.85 V @ 43...
Hi, You will need some kind of amplification. An instrumentation operational will do the job. It will also help to avoid overloading the output signal, and...
In India, the Honeywell sales rep for HMC products is: 56 AND 57 HADAPSAR INDUSTRIAL ESTATE PUNE 411013,INDIA 411013 Phone 91 2056039400 Fax 91 20 5603 9979 ...
Hi: I had a need for a small low cost 5 Volt battery type supply to power some magnetic sensors in the field. To meet this need I've come up with what I call a...
Hi: More on making zero field cans. http://www.pacificsites.com/~brooke/Sensors.shtml#Shielding So far using different thickness of Netic material to make cans...
... Why not try with the cans with the open ends facing opposite directions? That should be similar to having a cap but work with your present cans as is. ...
Hi Gerald: Installing the smallest diameter can with the open end facing the closed end of the larger pair of cans does not result in an improvement. The...
Hi again: I've just posted a couple of photos, one of the ALS-208 Hall sensor (ranges +/- 2, 20 and 200 G) and the FLC-100 sensor (range +/- 100 uT) on my...
... Bummer. ... Well if it's magnetized the measured field should change with orientation, right? It probably will be hard to detect. I'd try rotating the...
Hi Gerald: I plotted the field inside just the 2x9 inch can and found that at the very bottom it's higher than for most of the length. So I expect that the...
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