Honeywell International Inc.

Rae Systems, Inc.

Na Wei

Ling Liu

Yuzhong Yu

Yan Zhang

Feng Liang

Qinghui Mu

Fucheng Zhang

Jianglin Jian

Various example embodiments described herein relate to a sensor assembly. The sensor assembly includes a first sensor cover and a second sensor cover. The first sensor cover is disposed on a first end of the sensor assembly and the second sensor cover is disposed on a second end of the sensor assembly. The first sensor cover defines a first capillary and the second sensor cover defines a second capillary therethrough. The sensor assembly further includes a first sensing unit, a second sensing unit, and a filter. The first sensing unit and the second sensing unit are disposed between the first sensor cover and the second sensor cover. In some example embodiments, the filter is reactive to a target gas and thereby prevents an inflow of the target gas through the second capillary into the sensor assembly.

Electrochemical gas sensor assembly

Embodiments relate generally to systems and methods for preventing reaction between a sealing material (epoxy) and an electrolyte material within a carbon monoxide (or other gas) sensor. In general, the electrochemical sensor disclosed herein comprises a gas diffusion working electrode, a counter electrode, and optionally, a reference electrode. Each electrode is in contact with an aqueous electrolyte. The gas sensor may comprise a tab located proximate to gaps in the housing of the sensor, wherein the tab prevents any sealing material that fills the gaps from entering the interior of the housing. In some embodiments, the tab may be attached to a counter electrode. In some embodiments, the housing may comprise a slot located about the gaps, wherein the tab fits into the slot of the housing.

Method for decreasing baseline under high temperature of gas sensor

An electrochemical HS sensor comprises a housing, an electrolyte disposed within the housing, and a plurality of electrodes in contact with the electrolyte within the housing. The plurality of electrodes comprises a working electrode and a counter electrode. A surface area of the working electrode in contact with the electrolyte is less than a surface area of the counter electrode in contact with the electrolyte.

Electrochemical sensor

An electrochemical hydrogen cyanide sensor () comprises a housing () comprising an opening () allowing gas to enter the sensor (); an electrolyte disposed within the housing (); a plurality of electrodes in contact with the electrolyte within the housing (), wherein the plurality of electrodes comprise a working electrode () and a counter electrode (), and wherein the electrodes comprise a metal catalytic material; and a filter () operable to cover the opening () of the housing (), and prevent hydrogen sulfide from reaching the electrodes, wherein the filter () comprises silver sulfate layered onto a polytetrafluoroethylene support material.

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Shanghai, China

Na Wei