I need a weighing scale that can count items based on their weight. For example is that a put a three specific item that has an identical weight, the weighing scale should be able to determine that the item that I put is three. Is there a shop where I can buy it?

I heard there are programmable weighing scale that I can use to be able count items based on their weight.

 

Just google "counting scale"

 

google counting scales.

edit: gopher beats frogger and wins the race.

 

Would one of these work for you?

http://www.harborfreight.com/digital-pocket-scale-93543.html#.UzCABVcUMz0