Moisture tester
US4168466A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 1977 |
| Grant date | Sep 18, 1979 |
| Priority date | — |
| Expiry date | Oct 21, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R27/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A continuous flow moisture tester includes first and second electrodes defining a capacitive-type test cell. The first electrode comprises a generally cylindrical tube of electrically conductive material, and the second electrode comprises a generally planar body of electrically conductive material disposed adjacent an inner wall of said first electrode member to define a substantially unobstructed passageway between the electrode members. Material carrying members are connected at an inlet and outlet of the passageway for providing a substantially constant flow of material therethrough and for maintaining the passageway substantially evenly filled with flowing material. An electrical circuit is connected with the test cell for producing a signal corresponding to the moisture content of the material flowing therethrough. The circuit is arranged for producing the above-described signal substantially independent of the density of the material or any variations therein, and in accordance with the electrical properties of the material-filled capacitive test cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.