This thread is just for monitoring other projects that uses the cheap 3 wire load sensors – and fail – in the most cases.
We are talking about this around $ 9 cheap 50 kg load cells that are used in bathroom scales, e.g. the model sold by Sparfun:
The first trial to use this kind of sensor for bee scales is direcly from the founder of Sparkfun Nathan Seidle:
The Internet of Bees: Adding Sensors to Monitor Hive Health
It is interesting that he did not use the sparkfun load sensors but a hackt bathroom scale!
The results are not realy good, a long calibraion time, over days (!), and not really stable output leads to the conclusion that this model is not usable for a pofessional or even hobby grade bee scale.
The second trial is by Geo Meadows
nvestigations into low cost Load Cells
Summary by Geo:
The evidence is that the cells are NOT SUITABLE for continuous beehive monitoring.
I think the original post is:
The third trial is
Beehive scale build details. finally