Most kitchen scales will do for weighing grain but you do need a thermometer. It's not good enough to rely on the boiler theromstat to guage your strike and sparging water temps. A simple mercury or alcohol one will do to start with but if you get a mercury one and break it during a brew and contaminate anything you'll have to dump the whole lot. An unlikely scenario, but one to bear in mind. I was using a mercury one up to a few weeks ago before I got a cool digital one. Can't wait to try it out.