Portable Temperature Calibrator” TCAL 1501 is a micro controller based precision “DRY BLOCK” temperature calibrators generates true reference temperature. The temperature controller of the calibrators uses a auto tune FUZZY PID controller algorithm. This response closely follows the heating / cooling curve of an actual thermal system. Place the sensor to be calibrated in the calibrator. Set the temperature from the 4.3 inch true TFT display with touch screen. Both Block, set and measure temperature can be read. When stabilization occurs, Simply read the temperature and re-calibrate the process system or sensor