All models feature APT.line® electronic controllers and preheating chambers, offering precise consistent temperature performance and industry leading recovery times after door openings. Specially designed two-point door closure system and thermal insulation provided added protection from changing environmental conditioins. The inner glass door seals hermetically to allow users to monitor cultures without influencing chamber conditions. Units also feature independent adjustable temperature safety devices with visual alarm. RS-422 interface for standard software guarantees seamless documentation of all testing parameters.