
NTC Thermistor Resistance Testing: R/T Curve & Meter Checks
This guide covers one specific NTC check: measuring a probe’s resistance at a known, stable temperature and comparing it with that probe’s supplier R/T data. It helps identify measurement-method and curve-matching problems before a sensor is rejected or replaced. For broader open-circuit, short-circuit, wiring, or intermittent-fault diagnosis, see our NTC error and prevention guide. What you need before measuring Find the probe or thermistor part number and its supplier resistance-temperature table, nominal resistance reference temperature, tolerance, and applicable measurement notes. Prepare a suitable meter, a stable temperature source within the probe’s rated conditions, and a calibrated thermometer located close to








