Optical sight tube for fluid conduits
US4113390A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 14, 1977 |
| Grant date | Sep 12, 1978 |
| Priority date | — |
| Expiry date | Mar 14, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/85
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus for measuring a preselected characteristic, such as moisture, of viscous and/or absorption fluids in which an open hollow tube of optically reflective material is disposed within a fluid conduit closely adjacent an optical window to define a test material flow path between the window and reflector. A measurement beam incident upon the reflector tube from externally of the conduit through the window and test material is reflected thereby back through the material and window to detection apparatus. In alternative embodiments, the reflector tube is fixedly mounted coaxially with the conduit to define a fixed window/reflector separation, or is rotatably mounted eccentrically of the conduit axis for adjustment of the window/reflector separation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.