2-channel speed monitoring is a product category rather than a specific brand, commonly used in industrial automation and control systems. These devices are typically manufactured by various companies specializing in industrial equipment, such as those listed on Radwell (https://www.radwell.com) and Grainger (https://www.grainger.com). They are primarily used in manufacturing, energy, and transportation sectors to monitor and control the speed of rotating machinery. The 2-channel configuration allows for simultaneous monitoring of two different speed inputs, often providing redundancy or comparing different machine components. Major manufacturers of such equipment include companies like Banner Engineering (US), Pepperl+Fuchs (Germany), and Omron (Japan), though specific 2-channel models may vary by application requirements.