The XLB furnaces achieve high precision by featuring highly accurate digital PID controls, solid state contactors for fast cycle times, two zone control (top and bottom), and very even spacing of elements. They reach 2350°F (1285°C) with the standard iron-aluminum chrome elements or 2100°F (1150°C) with the optional nickel-chrome elements. The XLB is bench mounted. It features a spring loaded vertical lift plug door. The furnace shown has silicon carbide hearth, fan, and 100 mm strip chart recorder options.