But i concluded that with this equation i can't mesure 0 0C
But i concluded that with this equation i can't mesure 0 0C, even to get 1 0C my thermistor resistance has to be over 100 000 Ohms, that also is very high value and thermistor does not offer so high resistance values.
Then what actual resistance does your thermistor give you when you place it in a bath of ice water?
Putting that number in the function above (which is not the Steinhart-Hart equation, by the way) gives a temperature of 10°C.If I solve the function above for R, and calculate it for T=273K, I find R = 28,736Ω. Not exactly accurate, which is expected from the B-coefficient formula.That 18k is expected for a thermistor with your beta coefficient (see e.g. the TTF3A103 curve on p.3). For accurate results, use a calibration table - most likely you can find a table of resistance vs temperature for your thermistor.