Glossary of Important NTC Thermistor Terms

Technical advances have made NTC thermistors one of the most optimal sensors for applications between the range of -50°C and150°C. When thermistor users and their manufacturers strive for stronger working relationships, we will continue to see improvements in design quality and performance that will improve the entirety of the temperature control and measurement industry. Knowing some of the key terms used in the industry helps buyers to have a more in-depth conversation about NTC thermistor needs. Below, we will highlight the most commonly used words in the industry.


Accuracy: accuracy is defined as the closeness of agreement between temperature measurement and the measurand. Traditionally, equipment manufacturers used the term to discuss the tolerance of specifications, but more recently, international standards bodies have begun to classify it as a qualitative concept to not be used quantitatively. The current standard is to report measurement results that are accompanied by quantitative statements of uncertainty.

Error: results of measurements minus the values of a measurand

Repeatability:successful and consistent measurements of the same measurand that are carried out under the same conditions of measurement

Reproducibility: like repeatability, but results are carried out under changed conditions of measurement.

Resolution: this is a measure of the smallest segment of the signal that is observable.

Sensitivity: Small detectable changes in measure constitutes sensitivity. Ultimately the result depends on the resolution and the lowest possible measurement range.

Uncertainty: uncertainty is commonly referred to as the estimated possible deviation from the resulting temperature and its actual value.