Electro-optical fluid detector
US4631529A · kind A · utility
32Cited by
4References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 17, 1984 |
| Grant date | Dec 23, 1986 |
| Priority date | — |
| Expiry date | Oct 17, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F23/2921
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electro-optical circuit for detecting fluid in a translucent or a transparent duct or tube, this circuit including an AC activated light emitting diode (LED) for transmitting a narrow beam of light through the tube and a photo transistor detection, sub-circuit activated by the LED light beam, the power to the LED being adjusted to operate the photo transistor of the detection circuit in its unsaturated, active region of operation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.