Experimental electric range but generally from the following categories:
1. with on furnace shape can be divided into: box-type resistance furnaces and tubular resistance furnace;
2. from the operational procedures can be divided into: artificial and artificial intelligence programming resistance furnace resistance furnace;
3. test atmosphere conditions required can be divided into: oxidizing atmosphere resistance furnace and vacuum resistance furnace.
4. from the maximum temperature can be divided into: low temperature resistance furnace (600 c), medium temperature resistance furnace (600-1000), high temperature furnace (1000-1700), ultra high temperature furnace (1800-2,600).