Gas detectors are devices designed to identify the presence of specific gases in an area, ensuring safety and preventing hazardous situations. They are commonly used in industries such as oil and gas, chemical manufacturing, and mining, where toxic or flammable gases may be present. These detectors can alert users through alarms or visual indicators when gas levels exceed safe limits. There are various types of gas detectors, including electrochemical, infrared, and catalytic sensors, each suited for different gases and environments. Portable gas detectors are also available for personal safety, allowing workers to monitor air quality in real-time while performing their tasks.