Near-infrared diode laser based spectroscopic detection of ammonia: A comparative study of photoacoustic and direct optical absorption methods

Zoltán Bozóki, Árpád Mohácsi, Gábor Szabó, Zsolt Bor, Miklós Erdélyi, Weidong Chen, Frank K. Tittel

Research output: Article

48 Citations (Scopus)

Abstract

A photoacoustic spectroscopic (PAS) and a direct optical absorption spectroscopic (OAS) gas sensor, both using continuous-wave room-temperature diode lasers operating at 1531.8 nm, were compared on the basis of ammonia detection. Excellent linear correlation between the detector signals of the two systems was found. Although the physical properties and the mode of operation of both sensors were significantly different, their performances were found to be remarkably similar, with a sub-ppm level minimum detectable concentration of ammonia and a fast response time in the range of a few minutes.

Original languageEnglish
Pages (from-to)715-719
Number of pages5
JournalApplied Spectroscopy
Volume56
Issue number6
DOIs
Publication statusPublished - jún. 1 2002

ASJC Scopus subject areas

  • Instrumentation
  • Spectroscopy

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