170 • Replacing a Sensor
Gas Tracer Operator’s Manual, CSA Version
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 28: 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.
9. Place the belt clip into position and tighten the three screws retaining it.
Replacing a Sensor
1. Verify that the Gas Tracer is off.
2. Use a screwdriver to remove the three screws holding the belt clip to the back
side of the instrument. Two of these screws also secure the flow chamber.
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.
LEL Filter
CO Filter
Sensor
Gasket
