I am using an OPAMP INA145 ( INA145 data sheet, product information and support | TI.com) to increase the output of a differential pressure sensor, which is between 0 and 35mV. When I try measuring the amplified output, it is just zero all the time. I have no idea what's the problem so I am grateful for any suggestions!! The only thing I could think of might be the wiring of the OPAMP, especially of the Ref-pin as I just connected it to ground...
The picture shows the wiring, V0 (Pin 6) is going to the Arduino Board.