A temperature gauge is a device used for the accurate measurement and reading of temperature gradient. The term temperature gauge usually, though not always, refers to a device showing readings on a numbered dial. Dial thermometer gauges are often found in industrial and commercial settings.

Because the thermistor change in resistance is large compared to the resistance of the leads, a thermistor usually has a 2-wire connection. The excitation is converted to a voltage signal by the thermistor and the thermometer then converts the measured voltage to temperature.