We have two, both Salter brand. The first one, DH bought for weighing his beer-making ingredients. It's a spring-loaded one that comes with a bowl that fits on top. It was cheap, and works fine if you just need to estimate within an ounce or two.

I bought my digital kitchen scale for weighing supplements for my horse, who has a special diet. It is much more accurate. It weighs things down to the gram or 1/8 ounce, and I can put my vessel on it, then hit the Z button to zero it out, which is really helpful.

This is my digital one, though I guess I got a good deal, because I think I paid $20 or $25: http://www.bedbathandbeyond.com/product.asp?order_num=-1&SKU=13542210

This is the spring-loaded one, which is probably fine if you just want to track pounds of veggies produced:
http://www.bedbathandbeyond.com/product.asp?order_num=-1&SKU=13350086

Ebay has them cheap with free shipping.

I also have a small digital Salter scale but I've got to tell you that in growing tomatoes for many decades only ONCE have I ever deliberately weighed a few tomato fruits and that's when someone was asking about the largest tomato I'd ever grown and it happened to be a very wet summer and I had a few that got huge just from xs rain.

I'm not one who counts fruits on all my plants and nor do I weigh them. Probably many years ago I did weigh a few but then it was just as easy to estimate sizes in oz when recording data on new varieties being grown.

That's just me and I know there are those who methodically count fruits and weigh fruits but my personality doesn't allow me to do that. LOL

Fact is that for most of my tomato growing so called career I'd have hundreds of plants and varieties out there in a given season and it was enough to be able to record for new varieties; plant habit, leaf form, first blossoms, first fruit set, first ripe tomatoes, color and shape and size of fruits. ( smile)

Carolyn

I also recommend Salter brand.

We just went to Bed Bath an Beyond armed with a 20% off coupon and bought the cheapest Digi they had. Turned out to be a "Biggest Loser" one. Works great.
Oz or grams

I got mine on ebay a few years ago for I think about $18 delivered. It also has a removable clear bowl (not shown) that has a recess in its base to stay on the scale without sliding around or falling off... the bowl comes in handy for things like cherry tomatoes, flour, cooking/baking ingredients, weighing garlic heads, etc.

It measures in std or metric, up to 4.4lbs/2kg. It shows lbs plus oz to the tenth in std mode, plus has a tare feature to zero out with or without anything on it. The display is also backlit.

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Look for something with a removable bowl instead of a platter to be able to use it for things besides tomatoes, too!