srabsrab:
Something wrong with my circuit or this sensor is bad?
I had no little to no success getting the MD-PS002 to read much from a multi-meter or direct to Arduino. I did try an Op Amp LM385 and was able to get a rough reading of 10, 20, 30... wasn't enough resolution for my project. I did get the HX711 chips amplify the signal and the resolution is very fine with the 24-bit HX711. I used a breakout board with the HX711 chip and it was made for stress strain gauges. But, the HX711 can be used on wheatstone sensors like the MD-PS002.
The HX711 breakout boards are cheap on eBay:
