A single gas detector is a portable device designed to detect and monitor the presence of a specific gas in the surrounding environment. Unlike multi-gas detectors that can detect multiple gases simultaneously, a single gas detector is specialized to detect only one type of gas. These detectors are commonly used in industries where there is a specific gas hazard that needs monitoring.

Single gas detectors are equipped with sensors that are sensitive to the targeted gas. When the gas is detected at levels beyond the safe threshold, the detector activates alarms, alerting the user to the potential danger. The alarms are typically both audible and visual, providing immediate notification of hazardous conditions.

These detectors are essential in various industries, including oil and gas, mining, chemical, construction, and confined space entry, where specific gases may pose risks to worker safety. They serve as an important tool for ensuring a safe work environment, allowing workers to take appropriate precautions and actions in response to gas hazards.