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Air-Fuel Ratio Analyzers ECM offers six
high-quality AFR analyzers. All six analyzers measure AFR using UEGO
(Universal Exhaust Gas Oxygen) sensors. The UEGO sensor has revolutionized
AFR measurement because of its wide range, fast response, and ease-of-use.
The sensor consists of a spark plug-sized electrochemical cell which is
placed directly in the engine’s exhaust. The cell responds to O2, CO, H2,
and UHCs in the exhaust to determine AFR, Lambda, Equivalence Ratio, and %O2
for fuels of any composition (i.e. H:C, O:C, and N:C ratios, including
H2). All of ECM’s AFR analyzers can perform field calibration of the sensor
using ambient air.
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