Honeywell International Inc.

Life Safety Distribution Gmbh

Life Safety Distribution Ag

Lei Xiao

Keith Francis Edwin Pratt

John Chapples

Martin Geoffrey Jones

Qinghui Mu

Martin John Willett

Feng Liang

Sam Su

Ali Hosseinmardi

Terence Nicholas Moran

Jianming Jin

Allen Wu

Guoqiang Ni

Steven Leslie Scorfield

Apparatus and associated methods relate to a one-piece structure for a solid electrolyte chemical sensor (SECS) having a first surface defining a cavity () designed to receive a substrate () that retains a solid electrolyte (), an internal water impermeable coating () on at least a portion of the first surface, a second surface that is substantially coplanar with an adjacent peripheral edge of a top surface of the substrate () when the substrate () is received in the cavity (), and a plurality of electrical contacts (-) disposed on the second surface adapted to electrically couple with the electrodes (-) on the substrate () when the substrate () is received in the cavity () and electrical paths are provided between respective electrical contacts (-) and electrodes (-).

Electrochemical gas sensor housing having a one-piece design

A gas sensor includes know types of electrodes such has sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.

Auxiliary micro-electrodes for diagnostics of electrochemical gas sensors

An electrochemical acrylonitrile 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. The electrodes comprise a catalytic material, which may comprise gold. A potential is applied between the counter electrode and the working electrode.

Using a biased electrochemical sensor for acrylonitrile detection

A gas sensor including a housing containing a potassium permanganate element sandwiched between two polytetrafluoroethylene elements, a carbon element, a polytetrafluoroethylene element located adjacent to the carbon element, a sensing electrode, a reference electrode, and a counter electrode with attached current collectors, and an electrolyte.

Gas sensor with partitioned filter

A gas sensor includes known types of electrodes such as sensing electrodes, counter electrodes or reference electrodes to sense the presence of a predetermined gas. In addition, at least one diagnostic electrode is carried in the sensor. The diagnostic electrode implements at least one diagnostic function without substantially impairing the gas sensing function. The diagnostic electrode is immersed in sensor electrolyte.

An electrochemical detector can be powered partly, or entirely by voltages generated by the sensor. Using either active circuits or a passive component which produces a predetermined voltage drop in the respective sensor, two electrode consumable anode oxygen sensors can be provided which do not evolve hydrogen during operation.

Potentiostatic circuits for electrochemical sensors

A gas sensor in one form comprises a housing including a base and a top defining an interior space. The housing includes a gas entry hole and first and second electrical terminals. First and second electrodes in the housing interior space each comprise a membrane having a layer of platinum black catalyst on one side. The second electrode includes a lower amount of platinum black catalyst than the first electrode. A separator is placed between the first and second electrodes. Current collectors electrically connect the first and second electrodes to the respective first and second electrical terminals whereby sensor current represents concentration of gas while minimizing cross sensitivity.

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Lei Xiao