In 1985, Samtel Electron Devices began manufacturing electron guns for Black & White tubes. Later it started the manufacturing of High Resolution Monitor Guns, Special Purpose Guns for Medical Applications, Closed Circuit TVs and Radar Tubes which are exported to Europe, Japan and Korea. At present 3 types of Guns are being manufactured for various applications.

Currently Samtel Electron Devices is the dominant player in the Black & White Guns market with 76% market share in India.