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Titolo:
High precision trace humidity measurements with a fibre-coupled diode laser absorption spectrometer at atmospheric pressure
Autore:
Schirmer, B; Venzke, H; Melling, A; Edwards, CS; Barwood, GP; Gill, P; Stevens, M; Benyon, R; Mackrodt, P;
Indirizzi:
Univ Erlangen Nurnberg, Lehrstuhl Stromungsmech, D-91058 Erlangen, GermanyUniv Erlangen Nurnberg Erlangen Germany D-91058 -91058 Erlangen, Germany Natl Phys Lab, Teddington TW11 0LW, Middx, England Natl Phys Lab Teddington Middx England TW11 0LW TW11 0LW, Middx, England Inst Nacl Tecn Aerosp, Area Metrol & Calibrac, E-28850 Torrejon De Ardoz, Spain Inst Nacl Tecn Aerosp Torrejon De Ardoz Spain E-28850 on De Ardoz, Spain Phys Tech Bundesanstalt, Sect Thermodynam, Humid Stand Lab, D-38116 Braunschweig, Germany Phys Tech Bundesanstalt Braunschweig Germany D-38116 aunschweig, Germany
Titolo Testata:
MEASUREMENT SCIENCE & TECHNOLOGY
fascicolo: 4, volume: 11, anno: 2000,
pagine: 382 - 391
SICI:
0957-0233(200004)11:4<382:HPTHMW>2.0.ZU;2-R
Fonte:
ISI
Lingua:
ENG
Soggetto:
HYGROMETER;
Keywords:
trace humidity; absorption; diode laser absorption spectroscopy; frequency modulation spectroscopy; gas monitoring;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Schirmer, B Univ Erlangen Nurnberg, Lehrstuhl Stromungsmech, Cauerstr 4, D-91058 Erlangen, Germany Univ Erlangen Nurnberg Cauerstr 4 Erlangen Germany D-91058 ny
Citazione:
B. Schirmer et al., "High precision trace humidity measurements with a fibre-coupled diode laser absorption spectrometer at atmospheric pressure", MEAS SCI T, 11(4), 2000, pp. 382-391

Abstract

Laser absorption spectroscopy offers the potential for fast and precise trace moisture detection in gases at atmospheric pressure with a small cross sensitivity towards other molecules. We report on the development and calibration of a fibre-coupled tunable diode laser absorption spectrometer operating in the 1-100 ppm humidity range. The spectrometer was tested at three European humidity standards laboratories. The performance of the spectrometer was characterized by monitoring constant water vapour concentrations over several hours, yielding a good long-term stability, reproducibility and accuracy. The standard deviations of the measured water vapour concentrations for values above 5 ppm were below +/-2%. Comparisons of the instrument with chilled mirror hygrometers demonstrated its fast response time. The dependences of the signal upon the flow rate and temperature are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 09/04/20 alle ore 00:27:40