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Infrared light emitting diodes (LEOS) can replace the thermal source, bandpass filters and rotating chopper wheel of conventional infrared gas monitors. Their long-term stability, high modulation rate and compact size also provide design advantages. The performance of a family of mid-infrared monitors for measuring carbon dioxide and hydrocarbons is described. Various schemes are outlined for compensating temperature drift, outpullgain fluctuations. changes in cell transparency and mismatch between components.
|Glasgow Author(s) Enlighten ID:||Johnston, Prof Sean|
|Subjects:||Q Science > QC Physics|
T Technology > T Technology (General)
T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TD Environmental technology. Sanitary engineering
T Technology > TP Chemical technology
|College/School:||College of Social Sciences > School of Interdisciplinary Studies|
|Journal Name:||Measurement Science and Technology|
|Journal Abbr.:||Meas. Sci. Tech.|
|Publisher:||Institute of Physics Publishing|