hi,
On this sensor: https://www.robotshop.com/eu/fr/capteur-force-type-s-100-kg.html wich is a traction/compression loadcell,
it’s written that I have a rated Output of 3.0015mv/v
If I supply the sensor with Vdc=10V, what will be the theoretical output of the sensor in compression and traction? +30.015mv and -30.015mv ? or +30.015mv in both cases?
Hello @flo222
I’m not sure I understand you question, what do you mean by supplying 10V to the sensor? The input voltage of the sensor should be 5V and as load cells are just able to produce a tiny differential voltage the output must be read by a high-resolution analog-to-digital converter like the PhidgetBridge. So you would have to connect the output of your sensor to this device as it is shown here:
As you can see there are + and - inputs, you will have to connect those two wires into +/-. Apply a load, and if the V/V responds in the opposite way to your expectations, flip the +/- wires.
I hope that information can help you, let me know if you have any other questions 
thank you for your answer
However, in the datasheet it’s written that the recommended excitation voltage is 9/12 V and the allowed excitation 5/18 V , that’s why I will supply the sensor with 10v and use 12bit ADC. But you’re right, I apply a load and it responds to my opposite expectation, I’ll flip the +/- wires.
Thanks again 
You are right! I got confused with the input voltage of the PhidgetBridge 
But I’m glad I cleared up your doubt.
Good luck with your project!
