Polyport atmospheric gas sampler
An atmospheric gas sampler is described with a multi-port valve which allows for multi, sequential sampling of air through a plurality of gas sampling tubes mounted in corresponding gas inlet ports. The gas sampler comprises a flow-through housing which defines a sampling chamber and includes a gas outlet port to accommodate a flow of gases through the housing. An apertured sample support plate defining the inlet ports extends across and encloses the sampling chamber and supports gas sampling tubes which depend into the sampling chamber and are secured across each of the inlet ports of the sample support plate in a flow-through relation to the flow of gases through the housing during sampling operations. A normally closed stopper means mounted on the sample support plate and operatively associated with each of the inlet ports blocks the flow of gases through the respective gas sampling tubes. A camming mechanism mounted on the sample support plate is adapted to rotate under and selectively lift open the stopper spring to accommodate a predetermined flow of gas through the respective gas sampling tubes when air is drawn from the housing through the outlet port. 11 figures.
- Assignee:
- Dept. of Energy, Washington, DC (United States)
- Patent Number(s):
- US 5,404,763/A/
- Application Number:
- PAN: 8-087,550
- OSTI ID:
- 35050
- Resource Relation:
- Other Information: PBD: 11 Apr 1995
- Country of Publication:
- United States
- Language:
- English
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