Why is fuel cell technology used in the Intoxilyzer 9000?

The use of fuel cell technology in the Intoxilyzer 9000 primarily stems from its ability to provide accurate chemical readings of blood alcohol concentration (BAC). Fuel cells function by producing an electrical current when ethanol in the breath interacts with the fuel cell's components. This reaction is highly specific to alcohol, allowing for precise measurements of BAC without interference from other substances that might be present in the breath.

Accuracy is vital in breath alcohol testing, as it directly impacts legal proceedings and public safety. The specificity of the fuel cell technology ensures that the readings reflect true alcohol levels, making this method reliable and vital for law enforcement and legal use.

While other options mention factors like cost-effectiveness, performance in low temperatures, and calibration needs, these are secondary considerations in the context of the technology's primary purpose, which is to measure BAC accurately.