Aqueous sample testing apparatus
US5668330A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 10, 1996 |
| Grant date | Sep 16, 1997 |
| Priority date | — |
| Expiry date | Jul 10, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/1893
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Toxicity measuring apparatus comprising a sample reservoir in which an aqueous sample to be tested is stored, a reagent reservoir, a diluent reservoir, a mixing chamber vented via a first valve to atmosphere through an air inlet tube which extends within the chamber towards a lower part thereof, second, third and fourth valves via which the sample, the reagent and the diluent respectively are fed selectively to the mixing chamber in accordance with the open/closed state of the said second, third or fourth valves, a toxicity detector cell fed with a mixture of the sample, the reagent and the diluent from the chamber, within which detector cell aqueous sample measurements are carried out, a linear pump and valve means, via which valve means the mixture is drawn through the detector cell from the chamber by the linear pump, or via which air in an upper part of the chamber is drawn from the chamber by the pump in accordance with the open/closed state of the said valve means, whereby for the purpose of mixing the sample, the reagent and the diluent, the said valve means is set so that air is drawn into the chamber via the inlet tube so as to bubble up through the mixture contained there…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.