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US 7,256,882 B2Granted
Photometer device and method
AssigneeBGI Instruments, Inc.
InventorsRobert A. Gussman, Kevin E. DeVoe
Life of this patent
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Abstract
A photometer device including an inlet passage for receiving a fluid such as an aerosol at a specified flow rate, an outlet passage separated from the inlet passage by a gap, and a radiation passage across the gap. The flow rate and the significant dimension of the inlet passage are set to produce a laminar flow of the aerosol. The gap and the significant dimension of the outlet passage are set to maintain a laminar flow of the aerosol across the gap to prevent contamination of the radiation passage.
Claims8
A photometer device comprising:
- an inlet passage for receiving a fluid at a specified flow rate;
- an outlet passage separated from the inlet passage by a gap;
- a radiation passage across the gap;
- and
- the flow rate and the significant dimension of the inlet passage set to produce a laminar flow of the fluid and the gap and the significant dimension of the outlet passage set to maintain a laminar flow of the fluid across the gap to prevent contamination of the radiation passage.
2 more elements
A photometer probe adaptor comprising:
- a main block with a radiation passage therethrough;
- a fluid inlet conduit in the main block terminating in a distal round inlet end in fluid communication with the radiation passage;
- an outlet conduit in the main block terminating in a distal round outlet end in fluid communication with the radiation passage and spaced from the inlet end by a gap within the radiation passage;
- and
- the inner diameter of the inlet end less than the inner diameter of the outlet end to produce a laminar flow of the fluid, the inner diameter of the outlet end configured, the gap set, and the flow rate to maintain the laminar flow across the gap to prevent contamination of the radiation passage.
2 more elements
Dependencies are inferred from the claim text.