Abstract: Embodiments of the disclosure relate to capillary controlled gas sensors comprising a top cap assembly, wherein the top cap assembly is operable to reduce the effects of condensation and pressure changes on the effectiveness of the gas sensor. The top cap assembly comprises a capillary controlled gas flow path, a bulk flow control assembly, and a raised boss surrounded by a moat.

Abstract: A sensor with a sensor housing or body, a plastic molded table positioned in the sensor housing; and a counter electrode carried on a first end of the table.

Abstract: Embodiments of the disclosure relate to capillary controlled gas sensors comprising a top cap assembly, wherein the top cap assembly is operable to reduce the effects of condensation and pressure changes on the effectiveness of the gas sensor. The top cap assembly comprises a capillary controlled gas flow path, a bulk flow control assembly, and a raised boss surrounded by a moat.

Abstract: An electrochemical detector includes a carbon based element located between a separator and a current collector of an adjacent electrode. Elements can take the form of a carbon fabric located between the separator and the collector, or a linear, or, circular carbon deposit on a surface of the separator adjacent to the respective current collector. Other conductive coatings including gold, platinum or transition metals, as well as carbon, can be deposited directly onto a porous substrate, such as a masked separator material.

Abstract: A sensor with a sensor housing or body, a plastic molded table positioned in the sensor housing; and a counter electrode carried on a first end of the table.

Abstract: An electrochemical detector includes a carbon based element located between a separator and a current collector of an adjacent electrode. Elements can take the form of a carbon fabric located between the separator and the collector, or a linear, or, circular carbon deposit on a surface of the separator adjacent to the respective current collector. Other conductive coatings including gold, platinum or transition metals, as well as carbon, can be deposited directly onto a porous substrate, such as a masked separator material.

Abstract: A process is described for manufacturing gas diffusion electrodes, which process comprises: (a) treating an area of a pre-shrunk porous hydrophobic substrate so as to restrict the slurry deposited in step b) to the said area, preferably by forming a well in the area and/or treating the substrate in the area to render it less hydrophobic, e.g. by plasma treating the area; (b) dispensing a slurry of catalyst onto the said area, (c) removing liquid from the dispensed slurry, (d) treating the dried slurry to remove organic materials and e) cutting the catalyst and the underlying portion of substrate from the rest of the substrate.

Abstract: A flue gas probe that performs the sample conditioning functions of particulate and water removal at the point of sampling, i.e. within the flue or chimney. Particulate matter is removed by a porous ceramic filter positioned at one end of the probe. A polymeric drying element is also provided in order to remove water vapor from the sample by means of perevaporation.

Abstract: A fuel cell sensor (10) comprises a main body (11) in which are mounted working electrodes (12), counter electrodes (13) and respective contacts (14 to 17). The working electrodes (12) are mounted facing each other to define a sample space between them. The electrodes (12) are electrically interconnected in parallel as are the two counter electrodes (13). This arrangement makes it possible to provide a very large working electrode surface area for a small volume sample space (22).