154 • Replacing the LEL and CO Filters GX-2012 Operator’s Manual
3. Remove the belt clip and unscrew the remaining screw holding in the
flow chamber.
4. Grab the exhaust tube and pull it gently away from the unit to slide the
flow chamber out of the unit. The CO (charcoal) filter may come out.
5. To replace the LEL filter, remove the old one from its recess in the sensor
gasket and replace it with the new one making sure that it is properly
seated. You do not have to remove the sensor gasket to replace the LEL
filter. It sits in a recess on top of it.
6. To replace the CO filter, pull the old one out of its recess in the sensor
gasket if it did not already come out and replace it with a new one. You
do not have to remove the sensor gasket to do this. The CO filter sits in a
recess on top of it.
Figure 26: Replacing the LEL and CO Filters
7. Insert the flow chamber back into the instrument.
8. Tighten the top screw of the flow chamber completely.
LEL Filter
CO Filter
Sensor
Gasket
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