0 905101520 304050607080 100
180
160
140
120
100
80
60
40
20
0
CONTROLLER
DISPLAY
READING
(%LFL)
PERCENT OF METHANE (BY VOLUME)
LOWER FLAMMABLE LIMIT
(100% LFL)
UPPER FLAMMABLE LIMIT
C1125
Figure 5—
Typical Response of a Catalytic Sensor over a Range of 0 to 100% Methane by Volume
0 905101520 304050607080 100
100
90
80
70
60
50
40
30
20
10
0
CONTROLLER
DISPLAY
READING
(%LFL)
PERCENT OF OXYGEN IN MIXTURE (BY VOLUME)
B1126
50% LFL METHANE IN STANDARD AIR
4.5% METHANE
2.5% METHANE
90% LFL METHANE IN STANDARD AIR
Figure 6—
Effect of Oxygen Enriched and Deficient Atmospheres