PIEcal Model 525B is an industrial temperature sensor calibrator that accommodates RTDs (resistance temperature detectors) and thermocouples with a built-in NIST-traceable cold junction sensor. Suitable for use in calibration labs, the unit’s high accuracy and resolution are achieved by using an extremely stable, low drift circuit design featuring a ±0.05°C reference thermistor. The calibrator registers actual temperature and shows the precise resistance value when displaying RTD temperature. PIEcal Model 525B is compatible with all process instruments and connects directly to the temperature inputs of transmitters, PLCs and multichannel recorders to verify their outputs or displays.