Fluid flowmeter having a hall effect sensor with an internal magnet
US6789434B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 24, 2002 |
| Grant date | Sep 14, 2004 |
| Priority date | — |
| Expiry date | Aug 8, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/075
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A flowmeter for sensing fluid flow. The flowmeter includes a housing including a first port, a second port, a chamber in fluid communication with the first port and the second port, and a fluid passageway extending from the first port to the second port. An impeller having a non-magnetized metal pole piece is located within the chamber of the housing and is rotatable about an axis in response to fluid flow through the fluid passageway. A Hall Effect sensor and a magnet are located outside of the fluid passageway. The magnetic field generated by the magnet enables the Hall Effect sensor to sense rotation of the impeller and thereby the rate of fluid flow through the fluid passageway.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.