Relative Responses Of Gas Types - Crowcon IRmax Instructions D'installation, D'utilisation Et De Maintenance

3. Operation

3.4 Relative responses of gas types

The graph below shows the relative responses to other gas types for an IRmax calibrated
on methane.
Note: many hydrocarbon gases and vapours are more easily detected by IR
detectors than methane. The response of IRmax (and other IR gas detectors) will be
linear across the 0-100%LEL range for the target gas (ie methane in this example),
but non-linear for other hydrocarbons that may also be present.
Diagram 8
The diagram shows the approximate response of the gases mentioned above: from left to
right, butane, propane, pentane, hexane & petrol vapour and methane.
Other gas types and ranges are available. Please contact Crowcon for further details.
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Detecting Gas Saving Lives