Hi, I'd like to use a millivoltmeter to research voltages induced from a basic ceramic magnet brushing by a conductor. So, I need to buy a millivolt meter. What voltage ranges will be required, and what read-rate should the millivolt meter have (in order for it to register the voltage in a split second brush with the magnet)? Is 1 millivolt a reasonable value to expect? Any sources (books or online) you know I should check out related to this question? Also, it would be nice if it would record these voltages (or at least leave it displayed so I could record them). Can you suggest any particular model millivolt meter?