CALsys 1200 offers easy to use portable temperature calibrator with high temperature range from 250 to 1200C. It is a highly stable standard furnace for calibrating thermocouples / RTD. This calibrator can be used on site for high temperature calibration and also find application in glass, electric power, automotive and material process industry. The comparison volume is a metallic block of special material, which has a diameter of 37 mm and 215 mm long. The temperature of the calibrator is set and controlled by a self tuned PID controller with automatic super fine adjustment.