I think the one I used to use when I did pastry was the same one Kyle mentioned, the Salter Aquatronic. It's battery-powered, both English and metric measures (that is, #/oz and grams for dry, and fl oz and liters for wet -- although I never trust ANY scale to "measure" fl oz). Great little machine, and depending on where you get it, can cost as little as maybe $30. For that low price, order it from Bridge Kitchenware here in NYC (they probably have a website; surely you can find info on them from ads in the better professional food mags). Anyway, it's easy to clean, with a very small footprint, and works VERY VERY well. Just don't drop a meat pounder on the lcd screen, as I did.