Fluke Corporation​ is a world-renowned American manufacturer of professional electronic test tools, thermal imaging cameras, and precision calibration equipment, founded in 1948​ by John Fluke, Sr. in Everett, Washington, USA. As a wholly-owned subsidiary of Fortive Corporation​ (formerly Danaher), Fluke has grown into the global benchmark for safe, rugged, and accurate​ industrial measurement instruments, serving technicians, engineers, electricians, and maintenance professionals in over 100 countries.