|Repeatability||2°F to 15°F||0.05°F to 0.1°||0.2°F to 2°F|
|Stability||1° to 2° drift per year||Less than 0.10% drift in five years||0.2°F to 5°F drift in one year|
|Sensitivity||10 to 50 microvolts/°C||0.2 to 10 ohms/°C||100 to 1,000 ohms/°C|
|Temperature Range||-400°F to 4,200°F*||-200°F to 1,600°F||-150°F to 550°F|
|Signal Output||0 to 60 millivolts||1 to 6 volts||1 to 3 volts|
|Unique Features||Greatest economy; highest range||Greatest accuracy over wide spans; highly stable||Greatest sensitivity; lead effects minimized by high impedance|
The time constant of any sensor is defined as the time required for that sensor to respond to 63.2% of it's total output signal when subjected to a step change. The step change can be an increase in the parameter being measured. Five constants are required for a sensor to reach 99% of it's total change. The graph below illustrates this relationship.