... procedures can set PID intelligent adjustment, studio temperature uniformity (± 2oC / CM); Constant temperature zone length: 100mm, 200mm, 300mm,furnace ... furnace tube size: inner diameter φ80mm, length 1000mm; constant temperature area length: 600mm; 7. The Ultimate vacuum: lst ... the tubular structure and the pipe diameter and constant temperature zone length are customized by the user; recycled ...