A gas detector is a device designed to identify the presence of gases in an area, often as part of a safety system. These detectors can sense various gases, including carbon monoxide, natural gas, and methane, and are commonly used in homes, industries, and laboratories to prevent hazardous situations. When a gas detector detects a dangerous level of gas, it typically triggers an alarm to alert individuals nearby. Some models are portable, while others are fixed installations. Regular maintenance and testing are essential to ensure their reliability and effectiveness in protecting against gas leaks and potential explosions.