System and method for monitoring and maintaining a predetermined concentration of material in a fluid carrier
US4222497A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 1976 |
| Grant date | Sep 16, 1980 |
| Priority date | — |
| Expiry date | Mar 22, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S222/01
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method for monitoring and maintaining a predetermined concentration of material in a fluid body or carrier includes a control arrangement for detecting the transmissivity of a flow cell in each of two states. One of the states during which the flow cell is observed contains substantially no fluid present therein but provides a basis for determining the degree of existence of external factors affecting measurements made via the flow cell. The measurements for one state are subtracted from the measurements for the other in order to determine the transmissivity of the fluid body itself as distinguished from the combination of fluid body and flow cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.