Yokogawa Electric Corporation E7042UD Zirconia Cell

The Yokogawa E7042UD Zirconia Cell is a replaceable solid-state oxygen sensing element for zirconia oxygen analyzers, delivering fast, stable readings of O2 concentration in high-temperature combustion streams. Manufactured by Yokogawa, this zirconia ceramic element (with protective housing) operates on zirconia solid electrolyte electrochemical principles to convert oxygen concentration in gas streams into a measurable electrical signal. The model is designed for use in industrial furnaces, boilers, incinerators, and broader combustion systems for continuous flue gas oxygen monitoring, and it lists equivalents E7042UE, K9119ED, and K9119GE. Typical applications include power plants, steel mills, petrochemical facilities, and other industrial furnaces where combustion efficiency and emissions control are critical. Installation is probe-mounted within the analyzer sensor assembly, and it is compatible with Yokogawa zirconia oxygen analyzers (ZR series and similar) to support maintenance, replacement, and long-term sensor upkeep. Key characteristics include high accuracy, fast response, and stable long-term operation, enabling reliable measurements in challenging high-temperature environments and helping optimize combustion processes and regulatory compliance.