System for measuring flow of a liquid in a microfluidic circuit by determining gas and liquid pressures
US10677622B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 2017 |
| Grant date | Jun 9, 2020 |
| Priority date | — |
| Expiry date | Mar 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/48
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system to measure the flow rate of a liquid in a microfluidic circuit. The system includes a vessel that is partially filled with the liquid, a gaseous ceiling above the vessel and a pressure regulator to maintain the pressure of the gas in the gaseous ceiling at a predetermined value P1. A capillary pipe to extract the liquid from the vessel and to output the liquid at a pressure P2 lower than P1. A first inlet of the pressure sensor is connected to the gaseous ceiling, a second inlet of the pressure sensor is connected to the capillary pipe, and the outlet of the pressure sensor outputs a signal as a function of the pressure difference (P1−P2), which is a measurement representing the flow rate of pressurized P2 liquid supplied to the microfluidic circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.