Smiths Detection-watford Limited

Smith Detection-watford Limited

Smiths Group Plc

Graseby Dynamics Limited

Smtihs Detection-watford Limited

Smiths Detection-watford Liited

Alastair Clark

Jonathan R Atkinson

Stephen John Taylor

William Angus Munro

Bruce Grant

Robert Brian Turner

David Sharp

John Fitzgerald

Paul Douglas Arnold

Matthew Easton

Rod Wilson

David Cutmore

Frederic Fournier

Oliver Kirkby

Henry McIntyre

Matt Easton

Richard Turner, Legal Representative

Bruce Alec Colin Grant

Johnathan Richard Atkinson

John FitzGerald

Bruce Alexander Colin Grant

Jonathan Richard Atkinson

Henry Mcintyre

An ion mobility spectrometry method comprising (i) applying a voltage difference between a first electrode of an ion gate and a second electrode of the ion gate to prevent ions from leaving a reaction region of an ion mobility spectrometer; (ii) opening the ion gate to allow the ions to travel from the reaction region into a modification region between the first electrode and the second electrode; (iii) applying a radio frequency, RF, voltage between the first electrode and the second electrode to fragment the ions in the modification region to provide daughter ions; (iv) allowing the daughter ions to travel from the modification region into a drift region of the ion mobility spectrometer towards a collector; (v) closing the ion gate; and (vi) determining the time of flight of the daughter ions from the ion gate to the collector.

Method and apparatus for identifying substances using ion mobility based ion separation techniques

A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the flow of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

Detector inlet and sampling method

A detector inlet for providing a sample to an analytical apparatus for detecting an aerosol, the detector inlet comprising; an intake for inhaling a flow of gaseous fluid to be sampled by the analytical apparatus; a mixing region; a first conduit for carrying a first part of the flow of gaseous fluid from the intake to the mixing region; a second conduit for carrying a second part of the flow of gaseous fluid from the intake to the mixing region; and a heater configured to heat the first part more than the second part, and wherein the detector inlet is configured to combine the first part with the second part in the mixing region.

Detector with detector inlet for sampling gaseous fluid

A portable ion mobility spectrometry apparatus () for detecting an aerosol and a method for using the apparatus. The apparatus comprises an ion mobility spectrometer (); a portable power source () carried by the apparatus for providing power to the apparatus (); an inlet () for collecting a flow of air to be tested by the spectrometer (); a heater () configured to heat the air to be tested to vapourise an aerosol carried by the air and a controller () configured to control the spectrometer () to obtain samples from the heated air, wherein the controller is configured to increase a heat output from the heater () for a selected time period before obtaining samples from the heated air.

Method and portable ion mobility spectrometer for the detection of an aerosol

An ion filter for a mass spectrometer, the apparatus comprising an ion modifier; an ion selector configured to select a subset of a sample of ions based on their mobility in a gas; and a controller configured to operate the ion modifier in a first mode to modify the ions selected by the ion selector to provide daughter ions, and configured to operate the ion modifier in a second mode to output the ions selected by the ion selector; wherein the ion filter is adapted for providing output ions from the ion modifier to an intake of a mass spectrometer.

Method and apparatus for an ion filter of a mass spectrometer

A detector comprising an analytical apparatus for detecting a substance of interest, and a detector inlet. The detector inlet comprises a flow passage for carrying a flow of fluid, the flow passage comprising a sampling volume, and a sampling inlet adapted to collect samples of the fluid from the sampling volume as the fluid flows past the sampling inlet, and to provide the samples to the analytical apparatus, wherein the how of fluid carries particulates. The detector inlet also comprises a flow director arranged to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet along the flow passage without entering the sampling volume.

A detector inlet for providing a sample to an analytical apparatus for detecting a substance of interest, the detector inlet comprising a plenum for allowing passage of a flow of a gaseous fluid, the plenum comprising a sampling volume a sampling inlet arranged in the plenum and arranged to collect samples of the gaseous fluid from the sampling volume and to provide the samples to the analytical apparatus, wherein the flow carries particulates and a flow director arranged to create circulatory flow of the gaseous fluid around the plenum encircling the sampling inlet thereby to vary a spatial distribution of the particulates carried by the fluid to increase a relative proportion of the particulates carried past the sampling inlet without entering the sampling volume.

Apparatus and method for gaseous fluid sampling

An ion mobility spectrometer comprising an ioniser for ionising a sample; a detector separated from the ioniser by a drift chamber along which ions can travel from the ioniser toward the detector; a gate for controlling the passage of ions from the ioniser to the drift chamber; an ion modifier arranged between the ioniser and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

Ion modification

Ion filter for mass spectrometer

Ion modification An ion mobility spectrometer () comprising a sample inlet () comprising an aperture arranged to allow a sample of gaseous fluid to flow from an ambient pressure region to a low pressure region of the ion mobility spectrometer to be ionised; a controller () arranged to control gas pressure in the low pressure region to be lower than ambient pressure; and an ion modifier () configured to modify ions in the low pressure region, wherein the ions are obtained from the sample of gas.

Ion mobility spectrometer with ion modification

An ion mobility spectrometer comprising an ionizer for ionizing a sample; a detector separated from the ionizer by a drift chamber along which ions can travel from the ionizer toward the detector; a gate for controlling the passage of ions from the ionizer to the drift chamber; an ion modifier arranged between the ionizer and the detector and comprising a first electrode and a second electrode; and a voltage provider configured to provide a time varying voltage between the first electrode and the second electrode wherein the time varying voltage has a frequency of at least 2.5 MHz.

A portable ion mobility spectrometry apparatus () for detecting an aerosol and a method for using the apparatus. The apparatus comprises an ion mobility spectrometer (); a portable power source () carried by the apparatus for providing power to the apparatus (); an inlet () for collecting a flow of air to be tested by the spectrometer (); a heater () configured to heat the air to be tested to vaporize an aerosol carried by the air and a controller () configured to control the spectrometer () to obtain samples from the heated air, wherein the controller is configured to increase a heat output from the heater () for a selected time period before obtaining samples from the heated air.

Ion modification An ion mobility spectrometer () comprising a sample inlet () comprising an aperture arranged to allow a sample of gaseous fluid to flow from an ambient pressure region to a low pressure region of the ion mobility spectrometer to be ionized; a controller () arranged to control gas pressure in the low pressure region to be lower than ambient pressure; and an ion modifier () configured to modify ions in the low pressure region, wherein the ions are obtained from the sample of gas.

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Watford, United Kingdom

Alastair Clark