In the project if you look at the code the range of the thermistor is correlated with the range of values that the arduino is able to read from the analog pin. So an equitation is used to match the arduino range of 0 to 930 with the sensors range of 0 to 100 degrees.
temperature = ((100*1.1*aRead)/1024)*10;
This calculation multiplies the value from the digital pin
by 1.1 (our reference voltage) and again by 100. What
this does is stretch out or values from 0 to 930 to be a
value between 0 and 1023 (1001.1aRead). This
value is then divided by 1024 to give is a maximum
value of 100, which in turn is multiplied by 10 to add
an extra digit to the end, enabling the modulo function
to work.
Let[ch700]s look at
Now if you have a different way of coding it then great. Cause you need some way for it to translate the information coming into the arduino into a temp. So comparing one temp sensor to another to calibrate will only work if that knows sensor is also connected to the arduino so you can compare the 2 readings and adjust the equitation accordingly.
I guess you could assume the range is between 0 and 100 and the reference voltage is 1.1. Then try a comparison but it will be difficult to calibrate off that.