Welcome to ModelEngineMaker !If you have problems registering or logging in, please use the contact menu option to request assistance.
The key to that Arduino script is the circuit that produces the measured value. I am not very familiar with Arduino, but it looks like it is actually measuring a voltage at an ADC input and using ohms law and the value of the fixed resistor and measured input voltage to calculate the unknown resistance. Is this your understanding?
Did a quick test at a local gas station. Later on I will tank several times to get some data for a calibration of the senor.I want to read the sensor analogue. Resistance has some changed. But they are higher and that would be better for the arduino, lower amperage.Empty tank 3930 ohm.9.1 L 4080 ohm.24.8 L 4170 ohm.