NDIR reflection sampling in liquids
US9823185B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 2017 |
| Grant date | Nov 21, 2017 |
| Priority date | — |
| Expiry date | Jul 8, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2201/0696
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For determining concentration of a targeted molecule M in a liquid sample admixed with interfering molecules MJ which overlap its absorption band, a NDIR reflection sampling technique is used. Besides the signal source, a reference and an interference source are added. M is calculated by electronics which use Rave(t) from a pulsed signal and reference channel output and a calibration curve which is validated by use of RJava(t2) from a pulsed interference and reference channel output. Signal, interference and reference sources are pulsed at a frequency which is sufficiently fast so that a given molecule of M or MJ will not pass in and out of the liquid sampling matrix within the pulsing frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.