Hi,
Still very vague:
You as the designer have to give the specificatios. Nobody knows if you want to measure the weight of a mass of a tiny bug, or you want to measure the mass of a huge aeroplane.
Everything is possible.
There are mechnical limits --> search for weigh scale sensor manufacturers and read through their producht range
There are electrical specifications: What sensor do you want to use: analog, digital, what technology....
There are processing issues. Like precision, resolution, but also if you only have one sensor or you need to combine multiple sensors..
There are display limitations. like a 3 digit 7 segment display...
You have to define most of the parameters. Then do an internet search.
Klaus