Magnetic flowmeter with empty pipe detector
US5426984A · kind A · utility
18Cited by
19References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 2, 1993 |
| Grant date | Jun 27, 1995 |
| Priority date | — |
| Expiry date | Sep 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/002
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An electromagnetic fluid flowmeter includes empty pipe detection circuitry. The empty pipe detection circuitry applies a common mode asynchronous signal into a pair of electrodes in the flowmeter. Impedance of fluid is determined by measuring the magnitude of the asynchronous signal between an electrode and electrical ground. Impedance is used to determine an empty pipe condition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.