Flow and time proportional sampling system
US4022059A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1974 |
| Grant date | May 10, 1977 |
| Priority date | — |
| Expiry date | Aug 15, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N1/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A sampling system for drawing samples from a fluid flow which is responsive to manual actuation, predetermined increments of flow volume, or predetermined increments of time. The system includes a flow meter and a flow sampler interconnected and physically located in the vicinity of the flow being monitored. The flow meter converts the flow head to flow rate and subsequently to flow volume. The head to flow conversion is mechanical and provides for flow measurement through a flow channel having a given cross section shape over a wide range of shape sizes by means of an electrical adjustment. The flow meter provides for flow measurement through flow channels having varying cross secton shapes by means of selectively engaging a predetermined one of a plurality of cams designed to convert head to flow is being measured. The sampler is electrically connected to the flow meter for use in the sample per flow volume mode and provides for a constant volume sample which is independent of flow head, sampler height above the flow surface, power source voltage level, pumping time or any of the other variables which heretofore affected the sample volume. Automatic sequencing within the sampler …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.