I've been doing some reading on here about measuring temperature with NTC thermistors and using the Steinhart-Hart Equation.
However I am still a bit confused about the selection of a resistor to put in a voltage divider with the thermistor. Should I select a resistor value that is the same as the thermistor's resistance at the centre of my range of interest (200F) to maximise the sensitivity?
Also do I need an opamp or inamp to remove any noise common to both thermistor leads as the thermistor probe will be in an espresso machine boiler, so I expect some mains and switching noise ?
If I use a precision voltage reference for the thermistor, my current understanding is that I must use that same voltage for the ADC, is this correct?