Viewing windows and operating panels Viewing window To conceal display and operating instruments or cut-outs, and to protect against dirt and liquids as well as unauthorised access. Viewing window Viewing window for AX For external mounting on AX enclosures instead of a door and on surfaces. Show Products Viewing window Viewing window for AE For mounting on AE instead of door or sufficiently large surfaces. Show Products Viewing window Horizontally hinged FT stay for viewing window For external mounting on surfaces. A gas-pressurised spring holds the viewing window securely open (top or side). When the viewing window is closed, the gas pressurised spring disappears into the frame section. Show Products