I am attempting to make a cheap/simple temp circuit with a voltage divider. I have a 30k resistor and a 30k thermistor with 5VDC at Vref. I have been attempting to just calibrate it with an oven and a mercury thermometer. I have been running up the temp in the oven and then note the voltage drop across the thermistor and log the voltage drop with the mercury therm. Doing this multiple times i would think my voltage drop at a given known temp should be similar but it is not. P/N is 192-303ket-a01 Any thoughts? thanks