H frame or two bar frames?

OK, I see, tanks for the hint !
As a matter of fact with the load cells that I am using (H40 from Bosche), this factor doesn’t bring a real improvement. I have calibrated them separately (by measuring weight at three different temperatures) and with only this linear compensation, I have fluctuations lower than 10g. The only issue is to measure correctly the temperature and avoid the sun on the load cells (which was an issue for me in the test set-up, but not when the hives are sitting on the scale).