GB
MSA APPENDIX
Series 47K Gas Detector [SIL 2] 47
11. Appendix
11.1. Discontinued Gas Detectors
11.1.1 47K-ST
Relative response factors of tested gases with reference to Propane.
These values are only valid for new sensors and, unless otherwise stated, they
refer to an ambient temperature of 20 °C. In this case the displayed values may
vary by up to ±20% from the target gas concentration.
Sample gas 100 % LEL
in vol%
Propane
relative
response
factor
Response
time (secs)
t
50
*
Response
time (secs)
t
90
*
Propane 1.7 1.00 ≤ 11 ≤ 21
2-Butanon 1.8 1.15 ≤ 11 ≤ 27
Acetone 2.5 0.96 ≤ 11 ≤ 21
Acetylene 2.3 0.86 ≤ 9 ≤ 15
Ammonia 15 0.36 ≤ 12 ≤ 23
1,3-Butadiene 1.4 1.11 ≤ 11 ≤ 19
Diethyl ether 1.7 1.17 ≤ 10 ≤ 23
Acetic acid [50 °C] 4.0 1.41 ≤ 11 ≤ 35
Acetic hydride [50 °C] 2.0 1.44 ≤ 11 ≤ 35
Ethane 2.5 0.79 ≤ 10 ≤ 18
Ethanol 3.1 0.88 ≤ 16 ≤ 29
Ethene 2.3 0.85 ≤ 9 ≤ 16
Ethyl acetate 2.2 1.11 ≤ 11 ≤ 26
Ethylene oxide 2.6 1.03 ≤ 11 ≤ 20
Gasoline
[FAM-Benzine 65/95]
1.1 1.25 ≤ 11 ≤ 27
i-Butyl acetate 1.3 1.46 ≤ 13 ≤ 34
n-Butyl acetate 1.3 1.51 ≤ 13 ≤ 41
n-Butane 1.4 1.09 ≤ 11 ≤ 22
n-Hexane 1.0 1.44 ≤ 11 ≤ 28
n-Nonane 0.7 2.03 ≤ 16 ≤ 42
n-Pentane 1.4 1.09 ≤ 11 ≤ 24
2-Propanol 2.0 1.11 ≤ 11 ≤ 25
Propene 2.0 0.88 ≤ 10 ≤ 17
Propylene oxide 1.9 1.15 ≤ 10 ≤ 21
Toluene 1.1 1.34 ≤ 11 ≤ 26
Hydrogen 4.0 0.5 ≤ 9 ≤ 13
Xylene [50 °C] 0.96 1.57 ≤ 13 ≤ 33
Cyclo pentane 1.4 1.11 ≤ 11 ≤ 23
Allyl alcohol [50 °C] 2.5 0.92 ≤ 10 ≤ 21
i-Butylene 1.6 1.03 ≤ 10 ≤ 19
i-Butane 1.5 1.06 ≤ 11 ≤ 22
Methanol 5.5 0.73 ≤ 10 ≤ 18
Cyclo hexane 1.2 1.21 ≤ 18 ≤ 36
*) Response times are with a flow through adapter and a gas flow of 1 l/min
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