Oxymeter
US4593248A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1984 |
| Grant date | Jun 3, 1986 |
| Priority date | — |
| Expiry date | Mar 27, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/60
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ESR spectrometer is employed to measure the oxygen concentration in a sample material. Electron paramagnetic resonance is produced in a free radical mixed with a standard material of known oxygen concentration. The phase of the signal produced by this resonance is compared with the phase of the signal produced by the electron paramagnetic resonance of the free radical mixed with the sample material. The oxygen concentration in the sample material has a single valued functional relationship with respect to this phase difference and is calculated in a microprocessor-based control system. At low oxygen concentrations, the relationship is a linear one.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.