Physics – Optics
Scientific paper
Feb 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995spie.2366...65s&link_type=abstract
Proc. SPIE Vol. 2366, p. 65-69, Optical Instrumentation for Gas Emissions Monitoring and Atmospheric Measurements, Joseph Leonel
Physics
Optics
Scientific paper
Three versions of a near infrared system based on commercial communication type laser diodes have been developed. They have high selectivity and good sensitivity for a number of important gases. All three systems use a common control and data logging and analysis box. The LASAIR-R is a simple, inexpensive, remote sensing instrument using a single 10 cm Cassegrain telescope to both transmit and receive the laser beam. The LASAIR-S is a system for continuous, non-extractive stack monitoring. Fiber optics are used to take the laser beam from the control box (suitably located in the plant), to the stack and to bring the return back to the box. The LASAIR-P is a point source instrument using a multipath cell inside the box to provide the sensitivity required. The ease of operation and the relatively low cost should make these systems an attractive method for measuring specific gases for industrial and regulatory markets.
Mackay Gervase I.
Nadler Shachar D.
Schiff Harold I.
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