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Meters for lecture hall



We have been trying to locate meters (V & A) that could be used in a large lecture hall (100 or so people) and would be visible from the back of the room. We have a large demonstration galvanometer that can be configured for volts or amps, but we would prefer regular meters for each, with ranges that could be readily switched. Several people in our department have tried looking for such things in catalogs and on the web, but without luck. I volunteered to pose the question to this group.
Does anyone know of a source for large-display meters, preferably with digits 4 inches or so tall? The option of using a computer with projector for this purpose has been considered, but we would prefer a meter if such can be found. Thanks.
Rondo Jeffery
Weber State University
Ogden, UT 84408-2508
rjeffery@weber.edu