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Sensor Replacement
Under normal operating conditions, most sensors lose their original
sensitivity after the expected operating life and need to be replaced.
Warranties: The oxygen (O
(H
S) and carbon monoxide (CO) sensors all have a 2-year warranty.
2
The PID sensor has 1 year warranty.
Replace a sensor when it fails to calibrate.
The sensors are located inside the front of the monitor.
See Technical Note TN-114, Sensor Specifi cations And
Cross-Sensitivities, for additional information, available at
www.raesystems.com.
30 Maintenance
), combustible gas (LEL), hydrogen sulfi de
2
Figure 12. Sensor Locations.
PID
H
S
2
O
2
CO
LEL
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