A flow sensor is a device used to detect and measure the rate at which a liquid or gas moves through a pipe or conduit. In cybersecurity, flow sensors are often implemented in industrial control systems (ICS) and critical infrastructure to monitor the integrity and performance of physical processes. By providing real-time data on flow rates, these sensors help ensure operational safety and can alert operators to anomalies, such as leaks or unauthorized changes, which may indicate a security breach. Accurate flow measurement is crucial for maintaining process control, preventing damage, and supporting incident response in environments where both physical and cyber threats exist.