Non-prismatic optical liquid level sensing assembly
US6664558B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Oct 11, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2921
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optically based liquid level (liquid-vapor) detector for use with a window having a substantially planar side facing the liquid-vapor side and a substantially planar side positioned parallel to the liquid-vapor side facing the outside. The detector comprises a light source positioned on the outside of the window to direct its light through the outside planar side to the inside planar liquid-vapor side and a light detector positioned on the outside of the window to receive light transmitted from the source and returned from the planar liquid-vapor window side. The detector further includes electronic means for detecting the light intensity change affecting the transducer, from the condition of liquid on the liquid-vapor side, to the condition of vapor on the liquid-vapor side of the window, whereby an action or signal is generated in response to such change.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.