What Gas-Tec Detects - Crowcon Gas-Tec Manuel De L'utilisateur

Gas-Tec
See the list of warnings in Section XIII for more details .
The person responsible for providing hydrogen cylinders should read Sections XIII and X .1 of this manual .

2.4 What Gas-Tec detects

Most users will be using Gas-Tec to detect methane . The instrument is also sensitive to other hydrocarbon
gases such as propane . If other hydrocarbon gases are present, the Gas-Tec reading will reflect their
presence .
The Gas-Tec's response to other gases differs from the reading shown for methane .
Correction factors for some common hydrocarbons are shown below:
Gas detected
Propane
Butane
Pentane
Hexane
Heptane
Octane
Tetrahydrofuran
Divide reading by number shown to
obtain actual concentration of gas
1 .8
2 .0
2 .7
3 .1
2 .6
3 .1
0 .5
Gas-Tec Introduction
21