What is Safety Instrumented Systems (SIS)?

Safety Instrumented Systems (SIS) are engineered safety systems designed to prevent or mitigate hazardous events by taking a process to a safe state when predetermined conditions are violated. They are commonly used in industries with high-risk processes, such as oil and gas, chemical processing, and nuclear power, to protect personnel, equipment, and the environment from potential hazards like explosions, fires, or toxic releases. SIS typically consist of sensors, logic solvers, and final elements that work together to detect dangerous conditions and initiate corrective actions.