Intertron Industries, now known as Intertron Industries, Inc., specializes in manufacturing resistance welding controllers and equipment. The company was founded by Ricky Martin in 1977 and is recognized for inventing and patenting the basic principles of digital heat control. Intertron Industries produces multiplexed front panel multiple weld schedule controllers for the aerospace industry, with a focus on simplicity of operation, high reliability, and ease of maintenance. They offer single-phase controllers with optional features like AVC, constant profile current, electronic pressure regulation, and motor speed control for spot welders, butt welders, seam welders, and mesh welders worldwide. The company sells its products exclusively through manufacturers of resistance welding machines and distributors experienced in installation and field service of resistance welding controllers.