Information on the Gastech Model RI-411, infrared CO2 indicator (letter to the editor).

Details

• Personal Author:
  Gorman, Richard W. ; Holcom B ; Huebener DJ
• Description:
  Information on a problem discovered in the use of the Gastech Model R1-411, Infrared CO2 Indicator for evaluations of indoor air quality was provided. The approximate time constant and magnitude of the drift effect seen when the instrument was taken into a high carbon- dioxide (124389) (CO2) area were determined. Evaluation showed a problem exists in the instrument due to a dead air space between the infrared source and the active/reference cell. Changes in the concentration of CO2 in this space during a measurement caused the reading to change. Movement of the instrument from one area to another to measure CO2 levels may cause the data to be inaccurate. Possible fixes were investigated: pumping zero air into the dead air space; and pumping sample air into the dead air space. Although either fix will improve the precision, neither fix was entirely satisfactory. In a reply from the maker of the unit, possible modifications to the unit and alternative instruments for use in measuring CO2 for indoor air quality evaluations were discussed. Description provided by NIOSH
• Subjects:
  • Air Pollution, Indoor
  • Environmental Health
  • Environmental Monitoring
  • Occupational Health
  • Safety
• Keywords:
  • NIOSH-Author
  • Air-sampling-equipment
  • Air-quality-monitoring
  • Testing-equipment
  • Indoor-air-pollution
  • Analytical-instruments
  • Air-samplers
  • Air-quality-measurement
  • Indoor-environmental-quality
• ISSN:
  0882-8032
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  Ohio ; OSHA Region 5
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DPSE - Division of Physical Sciences and Engineering ; DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  4
• Issue:
  1
• NIOSHTIC Number:
  nn:00185439
• Citation:
  Appl Ind Hyg 1989 Jan; 4(1):F6-F8
• CAS Registry Number:
  • Carbon dioxide (CAS RN 124-38-9)
• Federal Fiscal Year:
  1989
• Peer Reviewed:
  False
• Source Full Name:
  Applied Industrial Hygiene
• Download URL:
  https://stacks.cdc.gov/view/cdc/185704/cdc_185704_DS1.pdf
• File Type:
  [PDF - 415.24 KB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:dc946b0c2f9bd841c3943f1811aac23fd420ac918c1ff4680dc359023904cebb99cc3876deb447a85d4f2d955a6b6e3f549f4a31e4e765ae45084c753d9e2e90