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Revision 5 (p/n: 17120932)
INDUSTRIAL SCIENTIFIC
37
Replacing The Sensor Water Barrier/Filter
The sensor in your GasBadge Plus single-gas monitor is protected from liquid and
particulate contamination by a gas-permeable PTFE filter membrane. This
membrane may become obstructed by dirt, oil or other matter, blocking that
pathway of gas to the sensor. An obstructed membrane can be detected by
performing a routine “bump test” or calibration of the instrument. Failure of the
instrument to respond properly to gas during the test may indicate that the
membrane is blocked.
An obstructed filter membrane must be replaced prior to further use of the gas
monitor.
To replace the membrane:
Remove the obstructed
membrane from the instrument
case-top.
Remove the new membrane
from the adhesive backing.
Replace the new membrane by
adhering it to the sensor
opening in the case top as
shown.
Use caution not to excessively
rub the membrane with your
fingers during replacement as
oils from your skin may cause
the filter to become obstructed.
For your convenience, one replacement PTFE membrane has been included with
your GasBadge Plus. Additional membranes may be ordered from your local
supplier of Industrial Scientific products by ordering
P/N 17120643.