Answer :
Final answer:
The concentration of a flammable vapor or gas in air is best measured by a Combustible Gas Indicator (CGI), which is specifically designed for this purpose. Other instruments like Photoionization Detectors (PID) can also detect gases but are not exclusively focused on flammable ones. Safety devices such as FRM and oxygen meters are important but do not directly measure flammable gas concentrations.
Explanation:
Understanding Measurement of Flammable Vapors and Gases
In the context of measuring the concentration of a flammable vapor or gas in air, the most relevant device is the Combustible Gas Indicator (CGI). This instrument is specifically designed to detect and measure the presence of combustible gases, ensuring safety in environments where such gases may be hazardous.
There are several tools available for detecting flammable gases, including:
- Combustible Gas Indicators (CGI): These devices provide real-time measurements of flammable gas concentrations and are often used in industrial settings.
- Photoionization Detectors (PID): While PIDs can detect low levels of volatile organic compounds and some gases, they are more suitable for measuring a wider range of gases than just flammable ones.
- Flame Resistant Monitors (FRM) and Oxygen Meters: Though important for safety monitoring, they do not specifically measure flammable vapor concentration.
In summary, while multiple devices can be utilized, for measuring the specific concentration of flammable vapor or gas in air, the CGI is the most effective and relevant choice.
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