Fluke CV400 ClirVu Infrared Window 95mm for Thermal Imaging Inspections provides essential protection for technicians working in high-voltage electrical environments that need to do high-quality thermography work while avoiding the dangers that can come from open electrical panels and the inconvenience that comes with using full Personal Protection gear. The Fluke CV400 uses the exclusive Fluke ClirVU manufacturing process that seals the optic prior to assembly making the window resilient against moisture damage in very hot or cold environments. Fluke CV400 ClirVu IR Window can be installed with one standard Greenlee punch hole, grounds automatically and instantly to the metal panel door using patent-pending AutoGround, and greatly reduces risk of arc flash for safer and more efficient work.