I need a new scale!

I need a new digital scale, does anyone know any that are ideal for measuring liquids from at least 500g to 0.01g 550k5?                               
I used to have a kitchen scale (used only for casting) that would measure to 0.1g (it's broken now).
But it was very unreliable when I wanted to cast small quantities of silicone, since the ratio would be 100:1 for the hardener.