Temperature-responsive device
AssigneeJohnson Matthey PLC
InventorGerald Sidney Iles
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Abstract
A method and apparatus for detecting changes in the composition of a stream of gas. In particular the method comprises the step of disposing a thermometer in the gas stream, in contact with or downstream of a catalyst so as to detect changes in the temperature of the catalyst or of the gas shortly after it leaves the catalyst, such changes being a function of the amount of gas which reacts under the influence of the catalyst.
Claims4
Apparatus for detecting changes in the composition of a stream of gas resulting from contact with a catalyst, said apparatus comprising first and second composite film electrical resistance thermometers which are connected in series and means for monitoring the voltage difference between said thermometers, said first thermometer including a coating of said catalyst and the two thermometers being arranged in side-by-side relationship in a holder with the resistive track of the second thermometer and the catalyst coating of the first mentioned thermometer facing outwardly of the holder for exposure to said gas stream.
Dependencies are inferred from the claim text.