MSA SOLARIS - Page 46

RESPONSE NOTES:
1. The compounds may reduce the sensitivity of the combustible gas sensor by poisoning
or inhibiting the catalytic action.
2. These compounds may reduce the sensitivity of the combustible gas sensor by
polymerizing on the catalytic surface.
3. For an instrument calibrated on Pentane,multiply the displayed %LEL value by the
conversion factor above to get the true %LEL.
4. These conversion factors should be used only if the combustible gas is known.
5. These conversion factors are typical for a Solaris Multigas Detector. Individual units
may vary by + 25% from these values
Table 6-5. COMBUSTIBLE GAS - Cross Reference Factors for
Solaris FX
This TABLE shows the variation in response of the 4P-50 CiTipel
®
on exposure to a
range of gases and vapors at the same % LEL concentration
GAS VAPOR RELATIVE GAS VAPOR RELATIVE
SENSITIVITY* SENSITIVITY*
Methane 100 Carbon monoxide 115
Propane 65 Acetone 70
nButane 65 Methyl ethyl ketone 55
n-Pentane 60 Toluene 40
n-Hexane 50 Ethyl acetate 60
n-Heptane 45 Hydrogen 115
n-Octane 40 Ammonia** 130
Methanol 95 Cyclohexane 55
Ethanol 85 Leaded petrol 60
Iso-propyl alcohol 60 Unleaded petrol 60
Acetylene 80 Ethylene 85
*Each sensitivity has been rounded to the nearest 5%.
**T
90
for Ammonia is extended. Contact City Technology for details.
RESPONSE NOTES:
1. The compounds may reduce the sensitivity of the combustible gas sensor by poisoning
or inhibiting the catalytic action.
2. These compounds may reduce the sensitivity of the combustible gas sensor by
polymerizing on the catalytic surface.
3. The figures are experimentally derived and expressed relative to the methane signal
(= 100).
4. These conversion factors should be used only if the combustible gas is known.
5. The results are intended for guidance only. For the most accurate measurements, an
instrument should be calibrated using the gas under investigation.
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