Exhaust gas analyzer of this sensor and to create smaller devices.Typical NDIR sensors cost in the (US) $100 to $1000 range. Used by older aircraft, the Cambridge Mixture Indicator displayed air-fuel ratio by measuring the thermal conductivity of exhaust gas. It was manufactured by the Cambridge Instrument Company. This device was installed on airplanes in the 1930s, including the Lockheed Model 10 Electra flown by Amelia Earhart on her last flight. Exhaust gas analyzer An exhaust gas analyser or exhaust CO analyser is an instrument for the measurement of carbon monoxide among other gases in the exhaust, caused by an incorrect combustion, the
North British Locomotive Company Railways (BR) designs pre-TOPS British Rail Class D3/1 (later D3/4), and later designated Class 21, Class 22, Class 41, Class 43 (Warship) and Class 251 (Blue Pullman) None of these were particularly successful: constructional shortcomings with the MAN engines made them far less reliable than German-built examples. A typical example of this was the grade of steel used for exhaust manifolds in the Class 43s – frequent manifold failures led to loss of turbocharger drive gas pressure and hence loss of power. More importantly, the driving cabs of the locomotives would fill with poisonous exhaust fumes. BR returned many North