IO-Link M19 modules are industrial automation products developed by various manufacturers, primarily in Germany and the United States, including companies like ifm, Balluff, and Pepperl+Fuchs. These modules serve industries such as manufacturing, automotive, and logistics, offering robust connectivity solutions for sensors and actuators. The M19 form factor ensures compact and durable designs, suitable for harsh environments. Key products include IO-Link masters, hubs, and device-level modules that enable smart sensor communication and integration with Industry 4.0 systems.