Electrical test and measurement equipment, insulation testers, circuit-breaker analyzers, and cable-fault locators, is the field Megger Group Limited leads, serving utility, manufacturing, renewable-energy, and transportation customers. The company's roots reach to 1889 through Evershed & Vignoles Limited (founded 1895), and the term 'Megger' became a trademark in 1903 for its pioneering insulation tester, the Megaohm Meter. Headquartered in Dover, UK, it operates in more than 100 countries with around 1,500 employees and has grown through acquisitions, Programma (2007), Power Diagnostix (2019), and Metrycom (2021), adding partial-discharge solutions and grid analytics (MGA). Its CertSuite software improves testing efficiency, its ISO 9001-certified AVO Training Institute has trained more than 230,000 professionals, and recent innovations include the MPAC128 acoustic imaging camera for gas and partial-discharge detection.