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64 • Appendix E: Infrared Methane Sensors Eagle Instruction Manual
Appendix E: Infrared Methane Sensors
Appendix E describes the Eagle’s non-standard, infrared methane
sensor. This appendix also offers additional information for
calibrating and replacing the infrared methane sensor.
Target Gases
The infrared methane sensors are setup for and factory-calibrated to
methane. This section lists other combustible gases known to respond
and to not respond to the infrared methane sensor. Consult RKI
Instruments, Inc., for combustible gases not listed below.
The following combustible gases are also known to respond to the
infrared methane sensors.
• ethane
• hexane
• IPA
• isobutane
• MEK
• propane
• toluene
The following combustible gases are known to not respond or
respond poorly to the infrared methane sensor.
• acetylene
• hydrogen
• styrene
Specifications
Table 13 lists specifications for the infrared methane sensor. The alarm
settings are user-adjustable (see “Updating the Alarm Point Settings”
on page 32.)
Table 13: Infrared Methane Sensor Specifications
Range Alarm 1 Alarm 2 TWA Alarm STEL Alarm
0 to 100% LEL CH
4
PPM (1)
10% LEL
5000 ppm
50% LEL
25,000 ppm
N/A
N/A
N/A
N/A
0 to100% Volume CH
4
10% VOL 20% VOL N/A N/A
(1) The PPM range for CH
4
is 0 to 50,000 ppm.