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 system using ambient air.
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