A smoke and gas leak sensor is a critical device designed to detect the presence of smoke, fire, or hazardous gases within a home, office, or industrial setting. These sensors serve as early warning systems, triggering alarms or notifications to alert occupants of potential dangers, allowing for swift evacuation or intervention to mitigate risks. Smoke sensors typically utilize optical detection technology, which detects smoke particles in the air, triggering an alarm when smoke levels exceed a certain threshold. These sensors are essential for fire detection and are often integrated into home security systems for comprehensive safety monitoring. Gas leak sensors, on the other hand, detect the presence of hazardous gases such as carbon monoxide (CO), natural gas (methane), propane, or other volatile organic compounds (VOCs). They employ various technologies such as electrochemical sensors for CO detection or semiconductor sensors for combustible gas detection. Gas leak sensors provide early detection of leaks, which can be potentially life-saving by preventing gas poisoning, explosions, or fires. Modern smoke and gas leak sensors often come equipped with features such as battery backup, wireless connectivity for remote monitoring via mobile apps, and integration with smart home systems. This allows for real-time alerts and notifications to be sent to homeowners or building managers, even when they are away from the premise.