Sample probe inlet flow system
AssigneeSmiths Detection-Watford Limited
InventorsMatthew Easton, Stephen J. Taylor
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Abstract
Ion modification An ion mobility spectrometer (100) comprising a sample inlet (108) 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 (200) arranged to control gas pressure in the low pressure region to be lower than ambient pressure; and an ion modifier (126, 127, 202) configured to modify ions in the low pressure region, wherein the ions are obtained from the sample of gas.
Claims21
An apparatus comprising:
- a sample receiving port configured to obtain a sample from a fluid flow to be analysed by a sample detector;
- an extraction port arranged to draw the fluid flow toward the extraction port for sampling by the sample receiving port;
- a curtain port, spaced from the extraction port;
- and
- an exhaust module for exhausting a first flow of fluid from the extraction port and supplying a second flow of fluid to the curtain port;
- wherein the second flow of fluid from the curtain port contributes to the fluid flow toward the extraction port for sampling by the sample receiving port.
An apparatus comprising:
- a sample receiving port;
- and
- an inlet assembly defining a volume for receiving a sample and comprising an extraction port configured for extracting a first fluid flow to facilitate a fluid flow toward the sample receiving port, wherein the inlet assembly further comprises a curtain port for supplying a second fluid flow to contribute to the fluid flow toward the sample receiving port.
17-27. (canceled)
A system comprising:
- a sample receiving port configured to obtain a sample from a fluid flow to be analysed by a sample detector,
- an extraction port arranged to draw the fluid flow toward the extraction port for sampling by the sample receiving port;
- a curtain port, spaced from the extraction port;
- an exhaust module for exhausting a first flow of fluid from the extraction port and supplying a second flow of fluid to the curtain port, the second flow of fluid from the curtain port contributing to the fluid flow toward the extraction port for sampling by the sample receiving port;
- and
- a detector arranged to obtain samples through the sample receiving port.
Dependencies are inferred from the claim text.