You can achieve accurate resistance-temperature-detector sensor measurements without having to resort to using a precision current source.

To calibrate this circuit, replace the sensor with a precision decade box. Set the decade box to simulate 0°C and adjust the offset trim of R 2 for an output of 0V at Pin 7 of IC 3 .

Of the temperature sensors nowon the market, thermocouples, RTDs,thermistors, and silicon-based sensorscontinue to dominate. The thermocoupleis most appropriate for higher-temperaturesensing, whereas ...