Spectrex 40/40I Triple IR (IR3) Flame Detector - Manual (Page 21)

TM 40/40I, Rev (6) July 2013
Performance Considerations 9
1.5.1.3 Other Fuels
The detector reacts to other types of fire as follows:
 The baseline fire refers to n-heptane 1ft 2 (0.1m 2 ) and is defined as
100% sensitivity.
 For fuel fire – standard pan fire size: 1 ft 2 (0.1 m 2 ).
 For gas flame - 20 inch (0.5m) high, 8 inch (0.2m) width plume fire.
 Maximum Response Time: 10 sec.
Table 3: Fuel Sensitivity Ranges
Type Of Fuel
Percent of Max. Distance
at each Sensitivity Range
Max. Distance
(ft./m)
Gasoline 100% 215 / 65
N-Heptane 100% 215 / 65
JP5 70% 150 / 45
Kerosene 70% 150 / 45
Diesel Fuel 70% 150 / 45
Ethanol 95% 60% 135 / 40
IPA 60% 135 / 40
Methanol 55% 115 / 35
Methane 45% 100 / 30
LPG 45% 100 / 30
Paper 35% 33 / 10
Polypropylene 15% 16 / 5