MSR ELECTRONIC PolyGard 2 MC2 - Page 11

User Manual PolyGard
®
2 Sensors 2023-11 Page 11 | 40
Combustible Gases
Chemical Formula
LEL (EU) /
% vol
Sensitivity % / Me-
thane
Relative Gas Density
(Air= 1)
Acetone
(CH
3
)
2
CO
2.5
40
2.00
Ammonia
NH
3
14
0.60
Petrol Vapours
n.d.
Benzene
C
6
H
6
1.2
35
2.70
Butadiene
C
4
H
6
1.4
50
1.92
Butyl acetate
C
6
H
12
O
2
1.2
25
4.01
Cyclohexane
C
6
H
12
1.0
50
2.90
Cyclopentane
C
5
H
10
1.4
65
2.42
Ethane
C
2
H
6
2.4
60
1.05
Ethyl acetate
CH
3
COOC
2
H
5
2.0
40
3.04
Ethanol (Ethyl alcohol)
C
2
H
5
OH
3.1
45
1.59
Ethylene
C
2
H
4
2.4
70
0.97
Iso/n-Butane
C
4
H
10
1.4
50
2.08
Iso/n-Pentane
C
5
H
12
1.1
45
2.49
Isobutyl alcohol
C
4
H
10
O
1.4
35
2.55
Isopropyl alcohol
(CH
3
)
2
CHOH
2.0
35
2.07
LPG
55
n.d.
Methane
CH
4
4.4
100
0.56
Methanol
CH
3
OH
6.0
75
1.10
Methyl acetate
C
3
H
6
O
2
3.1
50
2.56
Methyl ethyl ketone
CH
3
COCH
2
CH
3
1.5
40
2.48
n-Heptane
C
7
H
16
0.84
35
3.46
n-Hexane
C
6
H
14
1.0
40
2.97
Nonane
C
9
H
20
0.7
25
4.43
Octane
C
8
H
18
0.8
30
3.94
Propane
C
3
H
8
1.7
55
1.55
Propene
C
3
H
6
1.8
1.48
Toluene
C
6
H
5
CH
3
1.0
30
3.18
Hydrogen
H
2
4.0
110
0.07
Table 1: Combustible Gases
Toxic Gases
Chemical Formula
Relative Gas Density (Air= 1)
Ammonia
NH
3
0.60
Chlorine
Cl
2
2.48
Hydrogen chloride
HCl
1.27
Hydrogen cyanide
HCN
0.93
Ethylene
C
2
H
4
0.97
Ethylene oxide ETO
C
2
H
4
O
1.56
Formaldehyde
CH
2
O
1.04
Carbon dioxide
CO
2
1.53
Carbon monoxide
CO
0.97
Ozone
O
3
1.66
Oxygen
O
2
1.11
Sulphur dioxide
SO
2
2.73
Hydrogen sulphide
H
2
S
1.19
Nitrogen dioxide
NO
2
2.80
Nitrogen monoxide
NO
1.04
Hydrogen
H
2
0.07
VOC
VOC
-
Table 2: Toxic Gases