3. Operation
14
Detecting Gas Saving Lives
English
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.