Portable liquid baths SANSEL series TCAL 1501/- 40 is a micro controller based precision “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 closing follows the cooling curve of an actual thermal system. Place the thermometers and thermocouple & RTDs to be calibrated in the bath. Set the temperature from the 3.5 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.