Ultra-cold temperature calibration bath “SANSEL” series TCAL 1501 / - 80 is a micro controller based precision “ULTRA LOW TEMPERATURE LIQUID BATH” generates true reference temperature with high resolution and stability. The temperature controller of the bath uses a auto tune FUZZY PID controller algorithm. This fast response closely 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 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 master RTDs reading.