Analog Pressure sensor

When you want to measure pressure of liquids like oil or water, you could buy one of the pressure sensors on the internet, like this one:

It is very easy to install, has an analog output and a linear conversion. There are however a number of challenges:

1 If you want to measure pressure in Bar, how is it converted from PSI
2 How can voltages higher than 3.3 volts be measured with the on-board ADC
3 How can you make sensible readings with ESPEasy

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