Standard Practice for
Measuring the Concentration of Toxic Gases or Vapors
Using Detector Tubes1
This standard is issued under the fixed designation D 4490; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
Click below to download Astm D 4490 – 96 (Reapproved 2001)e1 pdf free
Click here to download Astm D 4489 – 95 (Reapproved 2001) Pdf Free Download