A maximum of 6 mantles which are made of a knitted layer of glass fabric combined with flexible heating elements, encased in mild steel housing. Temperature ranges from ambient to 350ºC controlled by Sunvic energy regulator with either a single control or individual controls, with corresponding indicating lamps. The distillation units are provided with a fume duct, which is held by clamps (provided with the unit) suspended on a stand having mobility for both horizontal and vertical movements. The digestion units are provided with the above features along with a condensing tank with individual condensing taps. They are placed on a MS angle stand with their respective controls supplied with / without any glass parts. Works on 220 V Mains supply.