NASA NTRS · 19790033838
A gas filter correlation analyzer for methane
Abstract
A fast-response instrument for monitoring CH4 was designed and tested using a modified nondispersive infrared technique. An analysis of the single-beam rotating-cell system is presented along with the signal processing circuit. A calibration of the instrument shows that the technique can be used to measure CH4 concentrations as small as 5 ppm-m and the effects of interfering gases are analyzed.
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Sebacher, D. I.. 1978-01-01. A gas filter correlation analyzer for methane. https://ntrs.nasa.gov/citations/19790033838
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