內部加熱

There are two ways of creating a temperature gradient across the length of a standard bar sample. The simple way is to move the sample slightly away from the center of the hot zone in the furnace. Another possibility is to install an internal heater. The first method is the most common way to do it and is a reliable method as long as you wait until the conditions have stabilized before doing the measurements. An internal heater can be bought separately either with or without a power supply.