Sulfur hexafluoride gas was the tracer gas used in the first roadway air dispersion model calibration. SF6 gas is used as a tracer gas in short-term experiments of ventilation efficiency in buildings and indoor enclosures, and for determining infiltration rates.
Sulfur hexafluoride gas is also routinely used as a tracer gas in laboratory fume hood containment testing.
Sulfur hexafluoride gas has been used successfully as a tracer in oceanography to study diapycnal mixing and air-sea gas exchange.
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