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Center for Advancing Research in Transportation Emissions, Energy, and Health (CARTEEH)

A USDOT University Transportation Center

  • Health Equity Framework Homepage
  • Strategies
  • Indicators
  • Tools

Exhaust Gas Analyzers

Exhaust gas analyzers are used to measure vehicle emissions, including oxygen, carbon monoxide, carbon dioxide, and hydrocarbons, as well as to calculate lambda (), a measure of the air/fuel ratio. A very precise method of gauging an engine’s combustion efficiency is provided by these metrics taken together.

This tool will help achieve the goal of the following objectives

  • Less Contamination
  • Less Emissions
  • Less Traffic Noise
  • Connectivity and Inclusion
  • Healthy Destinations
  • Less Traffic Violence
  • Active Transportation
  • Green Space

Estimation Technique

The estimation technique permits a probe to be positioned near a vehicle’s exhaust, where the gases are then collected and measured. Next, prior to administration, the quantity of fuel that generates these fumes is also measured. The air/fuel ratio is then calculated using the two estimated values, and the outcome provides a hint as to how much an automobile’s exhaust system releases gas emissions.