The chamber is a "still air enclosure" which contains both fluorescent and U.V. germicidal lamps. The U.V. system is rated at 254 nm and will decontaminate all surfaces of the interior. The lamp should be activated 15 minutes prior to and 15 minutes after planned use. The front viewing panel is .500 (13 mm) thick optically clear material. It is extremely effective for protection against 32P labeled compounds. It is very effective against Beta Rays but not Gamma rays. Front plate is replaceable (catalog # 825-UVC (F5)) Access to the interior of the chamber is gained by pushing the thumb knobs and lifting off the corner doors. The doors are removable therefore do not take up valuable laboratory counter workspace. If a corner door is opened, proximity sensors turn off the power to the U.V. System.