SANSEL series TCAL 1501/- 80 is a microcontroller-based precision “ULTRA LOW TEMPERATURE LIQUID BATH” that generates true reference temperature with high resolution and stability. The temperature controller of the bath uses an auto-tune FUZZY PID controller algorithm. This fast response closing follows the cooling curve of an actual thermal system. Place the thermometers, thermocouple & RTDs to be calibrated in the bath. Set the temperature from the 4.3-inch true TFT display with a touch screen. Both liquid and set temperature can be read. When stabilization occurs, simply read the temperature and re-calibrate the thermometer, sensor, etc.,. or comparison with the master RTDs reading.