Exhaust gas analyzer

In the UK, a list of acceptable exhaust gas analysers for use within the MOT test is available via the Driver and Vehicle Standards Agency website.

The Lambda coefficient (λ) is obtained from the relationship between air and gasoline involved in combustion of the mixture.

[5] New developments include using microelectromechanical systems to bring down the costs of this sensor and to create smaller devices.

Used by older aircraft, the Cambridge Mixture Indicator displayed air-fuel ratio by measuring the thermal conductivity of exhaust gas.

[6] This device was installed on airplanes in the 1930s, including the Lockheed Model 10 Electra flown by Amelia Earhart on her last flight.