Caterpillar Inc.

Xiaodong Liu

Douglas Alexander Rebinsky

Orhan Altin

Yong Tian

Svetlana Mikhailovna Zemskova

Jedidiah M Hastings

This disclosure relates to sulfur sensors that utilize sensing materials that can be used to detect a wide range of concentrations including ultra low concentrations of sulfur in liquids, such as below even 15 ppm. The sulfur sensors comprise a sensing electrode having a material that contributes an electronic output to the analysis and a material that contributes an ionic output to the analysis.

Electrochemical sulfur sensor and the method of making the same

A sulfur concentration detection system for detecting a sulfur concentration in a liquid includes a sensor having a conductive metal substrate and zinc oxide microstructures deposited on and protruding from the conductive metal substrate, a current source, and a voltage detector. An electrical resistivity of the zinc oxide microstructures is configured to change as a function of an amount of sulfur in the liquid available to react with zinc in the zinc oxide microstructures. The current source and the voltage detector are connected to the conductive metal substrate and configured to detect a change in the electrical resistivity of the zinc oxide microstructures.

Zinc oxide sulfur sensor

A measurement system is disclosed for determining a sulfur concentration in a liquid, such as a liquid fuel. The measurement system includes a first electrode that is at least partially coated with zinc oxide and, more specifically, zinc oxide microstructures. The zinc oxide microstructures have a crystal lattice structure that is oriented in the (002) plane. The first electrode may be connected to an electrometer which, in turn, may be connected to a second electrode. The second electrode may be disposed on a common substrate with the first electrode or may be in the form of a plate disposed substantially parallel to the first electrode.

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Peoria, IL, United States of America

Xiaodong Liu