Which meter is preferable for accurate testing of thermistors?

Using a digital ohmeter for testing thermistors is preferable because it provides an accurate measurement of resistance, which is key in evaluating thermistor function. Thermistors are resistive temperature devices that change their resistance with temperature variations. A digital ohmeter can deliver precise resistance readings, making it easier to determine the thermistor's characteristics and ensure it operates correctly.

Moreover, digital ohmeters generally have high input impedance and good resolution, allowing for small changes in resistance to be detected accurately, which is especially important given how thermistors can have very different resistance values depending on their temperature range.

In contrast, while analog multimeters can measure resistance, they may not provide the same level of sensitivity and accuracy, particularly for the low resistance values typical of many thermistors. Digital voltmeters can measure voltage but do not directly assess resistance, and capacitance meters are not suitable for measuring resistance at all, as they are designed to measure capacitance. Therefore, the digital ohmeter stands out as the most effective tool for this specific testing scenario.