Beta Constant Value is an indication of the shape of the curve that represents the relationship between the resistance and the temperature of a particular Thermistor.  Calculate the beta constant value to achieve the right characteristic at a given temperature vs the resistance for a specific application. it is a vital step in the component selection process.

It is the characteristic or the curve of  NTC thermistor that best defines the resistance as a function of the temperature.

• NTC thermistor Beta Constant Value Calculations use a two-point calibration to calculate the resistance vs the temperature curve and take into consideration the required resistance at both temperature points.
• The Beta Constant Value is measured in degrees Kelvin rather than Fahrenheit or Celsius, and it is calculated using the four components listed below.

NTC thermistors beta constant calculation formula

4 key Components of NTC thermistor Beta Calculations

1. R_T1 = Resistance at Temperature 1
2. R_T2 = Resistance at Temperature 2
3. T₁ = Temperature 1 (K)
4. T₂ = Temperature 2 (K)

Most of AMWEI NTC thermistor Beta B constant value is calculated from measurements at 25C and 50C, or 25C and 85C,
that is expressed in  B(25/50) , or B(25/85), or the other temperature point the user most concerned.