What is used to indicate the direction of toxic gas flow?

Wind direction indicators or flags are essential tools used to indicate the flow of toxic gas. They work by showing the direction of the wind, which helps personnel determine where the gas is moving. In scenarios involving hazardous materials, understanding the wind direction can be critical for safety and response measures. It allows responders to avoid areas where the gas might spread and helps in planning evacuations or containment strategies.

While smoke trajectory indicators can provide visual cues about gas dispersion, they are not as universally applicable or reliable for indicating real-time wind direction. Emergency alarms serve to alert personnel to dangers but do not provide information on wind or gas flow direction. Gas masks, while crucial for personal protection against inhalation of toxic substances, do not indicate gas flow direction. Thus, using wind direction indicators or flags is the most effective method for gauging and responding to toxic gas movements in a safe manner.