Opto-emulators is a brand or product category specializing in optoelectronic components, often associated with industrial automation and control systems. While specific details about a dedicated 'Opto-emulators' brand are limited, such products are typically manufactured by companies in the U.S., Germany, or Japan, like Omron, Schneider Electric, or Siemens. These devices serve industries like manufacturing, robotics, and process control, providing optical isolation, signal emulation, and testing solutions for sensors, PLCs, and other automation equipment. Key products may include opto-isolator emulators, LED simulation modules, and phototransistor testers, ensuring safe and efficient system diagnostics.