Measuring instrument and method for detecting the content of oil, hydrocarbons and oxidizable gases in air or compressed air
US8584505B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 5, 2010 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Aug 20, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/218
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a measuring instrument and method for detecting the content of oil, hydrocarbons and oxidizable gases in air or compressed air.In order to develop a measuring instrument for detecting the content of oil, hydrocarbons and oxidizable gases in air or compressed air, said instrument being suitable for detecting concentrations in the lower μg/m3 range or in the ppb range and allowing measuring accuracy of 10 micrograms oil/m3 air at a measurement error in the single-digit percentage range, it is proposed according to the invention that the measuring instrument comprises an air or compressed-air connection and, connected thereto, a flow limiter to which a catalyst is connected that is connected in turn with a photoionization detector, switchable means being provided for routing the air or compressed air over the oxidation catalyst or past it directly to the photoionization detector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.