| 1. | After finding the first letter in the name of your target gas or vapour in the above alphabetized index and clicking it, the list of all gases/vapours beginning with that letter will be displayed. Should your desired target gas or vapour not appear try looking for it under an alternate name (as many gases go by more than one name.) Some links to other helpful information are also provided for your reference. |
| 2. | Click on the tube no. or name for detailed information. Information on the individual detector tubes |