Method and apparatus for particle analysis
US4161690A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 5, 1978 |
| Grant date | Jul 17, 1979 |
| Priority date | — |
| Expiry date | Jun 5, 1998 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/132
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of, and apparatus for analyzing particles suspended in a liquid, especially blood cells wherein two vessels or receivers for the liquid containing the suspended particles therein are separated by an electrically insulating wall and an elongate channel penetrates through such wall. Two supply electrodes each respectively connected with one terminal of an electrical power supply contact the liquid in a respective one of the vessels. There is provided at least one auxiliary electrode contacting the liquid in the channel, and the dimensions of each such auxiliary electrode, in a direction parallel to the lengthwise direction of the channel, is small in relation to the length of the channel. There also are provided a number of feeler or sensor means, a respective one of which is operatively associated with a respective pair of the electrodes for detecting the changes, as a function of time, of the potential difference between these electrodes. There is formed an auxiliary value correlated to the timewise course of the potential difference between a given one of the auxiliary electrodes and one of the other electrodes and there is formed a measuring value correlated to the time-…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.