Here is an explanation about some of the equipment the P.I.G.S use on an investigation.
Static EMF Meter
Not really any good for actual mesurements in fugures however really usefull when left in vies of a CCTV camera of simmilar, as the presence of a magnatic field becomes apparent the nedle will move to the strength of the field
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Hints and Tips
Ideal to leave next to trigger objects and in view of a camera
When using the unit remember that is loves cables, electrical gadgets, mobile phones in fact anything with power, once you have eliminated all these things you are in a place to start.
This unit is probably best used as an alarm to the presence rather than a measurement of how much as the display and needle are somewhat inconsistent.