Grainger sells a portable digital gauss meter one for about $100. Case
extra. Model 1H144. Made by Excel. http://www.grainger.com
800-401-8440.
Another source is Nuts and Volts magazine. http://www.nutsvolts.com
Also try out the magazine sources mentioned by Bill Beaty's Weird
Science. http://www.eskimo.com/~billb
Jim Logue