Which device is often used to measure air quality and detect hazardous gases?

The use of a gas detector is crucial for measuring air quality and detecting hazardous gases, making it the most appropriate choice in this context. Gas detectors are specifically designed to identify the presence and concentration of harmful gases in the air. They utilize various technologies, such as electrochemical sensors, catalytic sensors, or infrared sensors, to provide accurate readings. This is essential for ensuring safety in environments where hazardous substances may be present, such as chemical plants, laboratories, or during hazmat incidents.

Furthermore, gas detectors can alert personnel to dangerous levels of specific gases, allowing for rapid response and mitigation of risks associated with exposure. This capability is critical for first responders and hazmat teams, as it helps them make informed decisions while protecting themselves and the public from potential harm.

In contrast, other devices have different functions; for example, thermometers measure temperature, manometers gauge pressure in gases or liquids, and barometers measure atmospheric pressure. These tools do not serve the specific purpose of monitoring air quality or detecting hazardous gases, highlighting why the gas detector is the best fit for the question.