- on Test & Measurement
- Published in issue 7/2012 on page 124
Pt100 is the designation for a platinum resistor that exhibits a value of 100 Ohm at a temperature of 0°C. If the ambient temperature rises (or falls), its resistance increases (or reduces), demonstrating a positive temperature coefficient. The progression for the Pt100 is not exactly linear but across a range from around zero to several hundred °C, and can be determined with adequate precision using a quadratic equation.