I want to measure weight of some objects which range from 50 grams to 20 Kg. So what kind of sensor should I use to get values with a precision of 1 gram. I tried a strain-gauge load cell of 20Kg, connected it to hx711, and this to arduino. But I get values which are not much accurate.(I may have not done it properly maybe). They show me different values every time I put the same weight.
I wanted to know if there is any good sensor for weight measuring sensor with a good precision of 1 gram.