Compact and reliable tube furnaces to meet your specific heating needs. These furnaces are microprocessor based with pid controller for excellent temperature controls to prevent overshoot from the setpoint. Durable heating resistors provide uniform heating with low energy consumption. Basic specification : dimension: 20x250 mm maximum temperature: 1100°c working temperature: 1075°c amperage (imax): 0.16666666666667 heating program: direct/ two step.