Safety Instrumented Systems (SIS) are designed to prevent hazardous events in industrial processes. They monitor conditions and automatically take action to maintain safety, such as shutting down equipment or isolating dangerous substances. SIS are crucial in industries like oil and gas, chemical manufacturing, and power generation. These systems consist of sensors, logic solvers, and actuators that work together to ensure safety. By continuously assessing risks, Safety Instrumented Systems help protect people, the environment, and assets from potential accidents, making them an essential component of modern industrial safety management.