Sensor A201 (25lbs/11.5Kg) but getting maximum data for 2.3Kg only.

once I applied the load,
2.3kg is the maximum which gives Vout= 1.25
even though I applied more load, it still gives the same Vout.
I’m not sure where I go wrong. in the datasheet of A201 stated that (Rf = 10K ~ 100K )

In the datasheet they used a potentiometer and not a fixed resistor to be able to alter the amplification factor. And they used another op-amp which may influence the factor too. The voltages are also different.

thanks for the reply sir. I am currently referring to the recommended circuit from this datasheet (Capture2.Jpg). the only difference is I’m using LM324 Op-amp.
based on the datasheet I have reduced the Vref and even tried to reduce the Rf still couldn’t get reading more than 2.3Kg.

thanks for the reply sir. I am currently referring to the recommended circuit from this datasheet (Capture2.Jpg). the only difference is I'm using LM324 Op-amp.

I see some other differences. You have and additional capacitor and supply voltage for the op-amp in the datasheet is -9V/9V while you use 0V/9V.

Vref of -5V is far too big. Try -1V.