Fotodyne Foto/Prep 3-3500 UV Transilluminator. Used working transilluminator in good condition. Large 21 x 38 cm viewing surface Two position intensity control Hinged UV blocking cover UviClear UV-transparent glass protector Four 15-watt 312 nm bulbs The FOTO/Prep has FOTODYNE's largest size UV filter glass. It is designed specifically to meet the demands of preparative DNA electrophoresis, the FOTO/Prep is built with a two-position control. The analytical mode provides nanogram level sensitivity. The reduced intensity, preparative mode allows visualization and excision of a 2000 bp band containing less than 10 ng of DNA. The gel can be exposed for 10 minutes with reduced photonicking.