DV-502 of Denton Vacuum is a thermal evaporator to deposit various metals on a substrate. The DV-502B will reach 10-4 Torr in a clean and outgassed system within 3 minutes, and 2 x 10-5 Torr within 4 minutes in the standard 12” dia. X 12” high bell jar. No discernible contamination is produced in preparing specimens for electron microscopy. The 1 kVA evaporation power supply permits evaporation of most materials used in electron microscope specimen preparation including carbon, gold, gold palladium, platinum, etc., and can handle many of the evaporations required in various metalizing, optical coating and other applications. The DV-502B has sufficient pumping speed to handle all of the standard Denton accessories as well as larger bell jars up to 12” dia. X 18” high.