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  • 标题:Pressure Responses of Portable CO2 Concentration Sensors
  • 本地全文:下载
  • 作者:Kulmala L. ; Grönholm T. ; Laakso L.
  • 期刊名称:Boreal Environment Research
  • 印刷版ISSN:1239-6095
  • 出版年度:2009
  • 卷号:14
  • 期号:04
  • 出版社:Finnish Limnological Society
  • 摘要:

    Here, we
    investigated the pressure response of five different models of portable
    CO2 infrared sensors: GMP343 (Vaisala Oyj, Finland), ADC LCA-2 (The
    ADC Bioscientific Ltd., UK), and three different EGMs (PP Systems, UK). In the
    pressure range of 750–1000 hPa, we found that the analysers function
    systematically in an individual manner and the original pressure corrections
    that the manufacturers have provided are inaccurate from a few to tens of ppm.
    Therefore, we determined new empirical pressure correction functions for each
    sensor. The resulting corrections perform better than the original ones in the
    pressure, CO2 concentration (370–490 ppm), temperature (5–21 deg.C)
    and water-vapour (4–11 g m–3) range of this study. However, since the
    individual analysers had different pressure responses, we recommend that each
    individual instrument be tested in cases where changes in pressure may affect
    the results.

  • 关键词:Pressure Responses;Different Models;Infrared Sensors;Infrared;Manufacturers
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