|Abstract Title:||A new laser sensing approach for application in fence line and fugitive emission monitoring|
|Presenter Name:||Mr Mohammed Belal|
|Co-authors:||Dr Damien Weidmann|
Dr Johnny Chu
Dr Arun Kannath
Dr Patrick Yeates
|Session Choice:||Fence line monitoring & measurement of fugitive/diffuse emissions|
Abstract Information :
Laser dispersion spectroscopy (LDS) is a new spectroscopic technique that provides unique advantages well suited for open path sensing. LDS is a novel technique for quantitative trace gas detection based on molecular dispersion measurements. In contrast to most gas sensing methods, LDS does not measure absorption but instead it detects refractive index changes that occur in the vicinity of a molecular transition. Because LDS is essentially a phase detection technique, the LDS measurement is highly immune to variations of optical power at the photodetector. This makes it particularly suitable for remote open-path sensing, where the received power level may strongly fluctuate due to rain, fog, humidity and other artefacts. MIRICO's LDS instrument has recently been combined with a unique emission mapping software developed by industrial collaborators for accurately locating and calculating he mass emission flux of detected sources.
This presentation will present these results and show the instruments capability in high precision sensing, long path lengths, ability to maintain performance in demanding conditions (high fog, rain, dust, etc). Direct field results from controlled releases will be presented showcasing the advantage the sensors offers when combined with emission mapping software.