Photometric device and photometric method for determining the gross calorific value of a test gas
US6555820B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 2001 |
| Grant date | Apr 29, 2003 |
| Priority date | — |
| Expiry date | Feb 23, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N21/3504
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A photometric device and method for determining the gross calorific value of a test gas, especially natural gas having a radiation source that produces a measuring beam and a modulation unit to modulate the measuring beam. A test cell with test gas and a receiver for the beam are arranged successively in the path of the measuring beam. The measuring signals of the receiver are supplied to an evaluation unit that includes at least one signal amplifier for the amplification of the signals. The signal amplifier is provided with adjustment devices to adjust the signal amplifier according the spectral properties of the measuring beam. The gross calorific value of the gas is indicated by the sum of the amplified measuring signals produced in a computing machine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.