The FLK-075-CLKT is a C-range Infrared Window for use with Fluke IR instruments. Inspections are now conducted quickly, easily and safer than they were before. The CLIRVU® coating - exclusive to Fluke infrared windows - seals the optic prior to assembly to protect against moisture degradation making it perfect for very hot and very cold outdoor environments. Each Fluke infrared window is delivered with an identification plate attached for unique, on-site numbering for rapid location confirmation and faster repairs. The 3460387 CLKT infrared window comes complete with a security access key, installation instructions and self-adhesive drilling template. Engineered and tested to withstand electric-arcs up to 50kA for 30 cycles.