RTD Conversion tool: R to T
This is used to calculate temperature value of RTD sensor from known resistance.
This calculation tool used to find out the temperature value of a RTD sensor with known resistance.
Calculate Temperature from Resistance
Formula:
Resistive Temperature Detectors (RTDs) relate resistance to temperature by the following formula:
  RT = Rref[1 + α(T − Tref)]
Where,
RT = Resistance of RTD at given temperature T (ohms)
Rref = Resistance of RTD at the reference temperature Tref (ohms)
α = Temperature coefficient of resistance (ohms per ohm/degree)
Example:
The following example shows how to use this formula to calculate the resistance of a PT100Â RTD with a temperature coefficient value of 0.00392 at a temperature of 35 degrees Celsius:
Assuming Temperature Reference = 0 Degrees
For PT100 RTD the Rref = 100
RT = 100 Ω[1 + (0.00392)(35 − 0)]
RT = 100 Ω[1 + 0.1372]
RT = 100 Ω[1.1372]
RT = 113.72 Ω
For Temperature to Resistance conversion also the same above formula applies.
The above given is a basic equation only for RTD calculation.
Note:
1.The above RTD calculation tool designed for a standard PT100 sensor.
2.If you are interested to calculate for a different RTD then change the fixed constant values as per the sensor type.
5 comments
Excellent Work Dude…. Thanks for sharing
Its a great instrumentation tool.
its great bt plz send mi various formula sits in excel type file on my mail id
Dear sir,
tell me how u have calculate temperature coeff. Value of resistance.
Hello Dheeraj, For Temperature Coefficient Value – Pl Click here to Read