Molecular sieve oxygen monitor
US4442698A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 24, 1983 |
| Grant date | Apr 17, 1984 |
| Priority date | — |
| Expiry date | Jan 24, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N33/0014
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A monitoring system for determining the concentration of oxygen in the product gas of an oxygen enriching system comprises a plurality of pneumatic nor gates. Means are provided for coupling the outlet port of each gate to the control port of the subsequent gate to form a closed loop and a plurality of molecular sieve beds are pneumatically connected one each to the control port of the nor gates. The molecular sieve beds adsorb oxygen from the product gas to attenuate the rate of pressure change in the control ports and thus, the oscillation frequency of the monitor. The oxygen concentration of the product gas may be inferred from the oscillation frequency of the monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.