What type of meter is typically used to check RTD or thermistor sensors?

The use of a digital ohmmeter is particularly suited for checking RTD (Resistance Temperature Detectors) and thermistor sensors due to their reliance on changes in resistance to reflect temperature variations. Both RTDs and thermistors operate on the principle that their resistance changes with temperature, making it essential to measure this resistance accurately.

A digital ohmmeter provides precise resistance readings, which is crucial for evaluating the performance and output of these temperature sensors. Its high accuracy and ease of use make it the preferred choice, especially in commercial food service equipment where precise temperature control is vital.

Understanding the specific characteristics of RTDs and thermistors can clarify why this type of meter is appropriate. RTDs typically have a linear change in resistance with temperature, while thermistors may have nonlinear characteristics, requiring a device that can provide precise and potentially quick measurements at varying resistance levels.

While a digital multimeter can also measure resistance, it is more versatile and might be used in a wider range of applications than simply checking the resistance of RTD or thermistor sensors, which makes the dedicated function of a digital ohmmeter more aligned with the task at hand. An analog ohmmeter could lack the precision required for such specific applications, and a digital voltmeter does not