Retherm is a simple application that converts resistances from RTD sensors to temperature. This app can currently convert Pt100, Pt500 and Pt1000 resistances to degree Celsius or Fahrenheit. The standard equations are done to the popular European/DIN standard for the temperature range of -200°C to +850°C with an average margin of error of about 0.02°C. An option is available for calculations to the less used American standard for the range 0 to 100°C with an average margin of error of about 0.2°