This brief article gives an outline of the construction and scope of the uras 2 infra-red analyser which has been designed to give a continuous measurement of CO in the atmosphere. The main purpose of the instrument is to provide a ready means of enforcing standards for the maximum level of CO resulting from exhaust emissions from motor cars. This instrument is based on the specific absorption of polyatomic non-elementary gases in the infra-red range. Absorption is measured with an alternating light photometer. Information is given on the construction of the instrument which has three ranges - 0 to 25, 0 to 50 and 0 to 100 parts/M. Details are given of the correct sampling procedure. The analyser includes a refrigeration unit for removing water vapour, a membrane to remove particles larger than one micron and provision for sequential sampling using multiple probes. /TRRL/

  • Availability:
  • Corporate Authors:

    Morgan-Grampian Limited

    30 Calderwood Street
    London SE18 6QH,   England 
  • Publication Date: 1974-2


  • English

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00260500
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Oct 11 1974 12:00AM