The Bartlett controller offers precise control and many features not available with other controllers. It comes with preset firing profiles, allowing you to fire by simply entering a cone number, as well as the option of user-defined programs. It will hold up to 6 user-defined programs with up to 8 segments in each program. Or as an option you can combine 2 programs to make one complicated program with up to 16 segments in it. The Bartlett controller has one thermocouple for each circuit in the kiln so it is excellent at ensuring even temperature from top to bottom. We still recommend the use of witness cones with all controllers. Those kiln model numbers with a bartlett controller installed are prefixed with a "BX". For example BX 1822D.