What is the primary operational challenge regarding the search radius of gas-sensing devices?
Answer
The utility diminishes as gas diffuses into large or poorly ventilated spaces.
The effectiveness of gas sensors is constrained by the concentration gradient of the target gas. While a device might easily identify a plume of carbon dioxide near a small opening or a concentrated source, its performance drops significantly as the gas dilutes within large, open, or poorly ventilated rubble voids. This diffusion effect reduces the effective search radius, making the sensor less reliable as the gas disperses, unlike radar waves which propagate more consistently through the structure.
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