I use a digital scale thats switchable from grains to grams. Used primarily for reloading ammo. It goes up to 50grams and is accurate to hundredths of a gram. You can get reloading scales pretty cheap now or pay several hundred dollars for them. I have one made by Dillion. It cost me around a hundred dollars about twenty years age.
My point is they are sold from many different vendors. Check out "Harbor Freight" they are pretty cheap