Optical reflectance gauge and method therefor
US3994602A · kind A · utility
14Cited by
7References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 12, 1975 |
| Grant date | Nov 30, 1976 |
| Priority date | — |
| Expiry date | May 12, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/10
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical reflectance gauge which serves as a chlorination sensor for paper pulp in which a spectrum of the bulk of the material is obtained by use of displaced windows in the pulp pipe. One window has a radiation source associated with it and the other a radiation detector. The distance between such windows is determined to provide for insensitivity to small changes in consistency for measurement of chlorination. A mechanical arrangement is also provided for easier coupling of the gauge to a pulp pipe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.