Infrared-based gas flowmeter
US10564019B2 · kind B2 · utility
0Cited by
2References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 23, 2018 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Oct 23, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/74
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention is a gas flowmeter that produces precise flow measurements at low-flowrate ranges (for example, between 0.25 mL/min to 5,000 mL/min). It uses an infrared (“IR”) beam to detect the passing of a gas bubble through a liquid within a glass column. A “broken” beam is detected by the microcontroller for each passing of a bubble. This ability to allow the IR beam to be broken exactly at the passing of a bubble is made possible by the slit-over-slit design at the sides of the glass column and the column holder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.