United Kingdom Atomic Energy Authority

Alphasense Limited

Capteur Sensors and Analysers Limited

Patrick Timothy Moseley

Peter Smith

David Edward Williams

Nevill J Bridger

John R Saffell

Peter McGeehin

Michael R Hill

Geoffrey Stephen Henshaw

Darryl Hirst Dawson

Laura Jane Gellman

Molybdenum oxide is doped with vanadium, nobidium, tantalum or titanium to form a stable MOtheta phase crystal structure as a vapor sensitive material for detecting vapors of volatile organic compounds. That material is used between electrodes connected to a measuring device to measure a change in an electrical quality in the presence of a vapor of a volatile organic compound. Concentration of the vapor is measured to low part per million ranges.

Highly effective sensor for the vapors of volatile organic compounds

The selectivity of response of resistive gas sensors to specific gases or vapors is improved by the selection of specified gas-sensitive materials which are not previously known for the applications described, which include detection of hydrocarbons in the presence of CO, H.sub.2 S, SO.sub.2, chlorine, NO.sub.2, CO.sub.2 (especially in low concentrations), CFC's, ammonia, free oxygen by determination of partial pressures, and numerous organic gases and vapors.

Semiconducting oxide gas sensors

A positive electrode for a lead acid electric storage cell is made by chemically preparing beta lead dioxide. The beta lead dioxide is then applied to a support structure with a binder, or poured into a permeable, tubular container located about a current collecting rod. The negative electrode can be made by compacting fine lead metal about a carrier, and the fine lead metal might comprise lead wool or particulate lead metal.

Lead acid electric storage cell and a positive electrode therefor

The positive electrode for a lead acid electric storage cell is made by preparing by a chemical route particulate beta lead dioxide, mixing together the beta lead dioxide with a relatively low proportion of a binder, and applying the mixture to a perforated electrically conductive support structure.

Method of manufacturing a positive electrode for a lead acid electric

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Chilton, United Kingdom

Patrick Timothy Moseley