A Volatile Organic Compound (VOC) sensor is a device designed to detect and measure the concentration of volatile organic compounds in the air. VOCs are harmful chemicals emitted as gases from certain solids or liquids, including paints, cleaning supplies, and industrial processes. These compounds can affect indoor air quality and pose health risks such as headaches, respiratory issues, or even long-term diseases. VOC sensors are widely used in smart buildings, industrial environments, and cybersecurity systems to monitor air quality, trigger ventilation, or alert users about hazardous conditions. In cybersecurity, they help protect sensitive equipment and personnel from chemical threats.