MSA PrimaX - Safety Relevant Parameters [40°C]

Special conditions for SIL 2
• The use of the sensors in a High Demand or Continuous Mode is allowed only in a 1002 - structure.
• The outputs of the sensors [4-20mA - loops and relay contacts] must to be monitored regarding
deviations.
Special conditions for SIL 3
• The use of the sensors is allowed only in a 1oo2 - structure.
• The outputs of the sensors [4-20mA - loops and relay contacts] must to be monitored regarding
deviations.
7.4 Safety Relevant Parameters [40°C]
Application with Relay
λ
total
λ
S
λ
D
λ
DU
λ
DD
SFF DC PFD
1oo1
PFD
1oo1
PFD
1oo2
PFD
1oo2
PFD
1oo2
PFD
1oo2
PFD
1oo2
PFD
1oo2
fit fit fit fit fit % % % of
SIL
2
% of
SIL
3
1/h % of
SIL
1
1/h % of
SIL
3
Ammonia
[NH
3
]
3737 2469 1269 415 854 88.9 67.3
7.9E-
04
5.6
1.2E-
05
1.2
4.2E-
07
4.2
8.7E-
09
8.7
Carbon
Monoxide
[CO]
3187 2194 994 255 739 92.0 74.4
3.4E-
04
3.4
7.0E-
06
0.7
2.5E-
07
2.5
5.3E-
09
5.3
Chlorine
[Cl
2
]
4332 2766 1566 589 978 86.4 62.4
7.8E-
04
7.9
1.7E-
05
1.7
5.9E-
07
5.9
1.3E-
08
12.7
Combusti
ble
6666 3933 2733 1066 1667 84.0 61.0
1.4E-
03
14.3
3.1E-
05
3.1
1.1E-
06
10.7
2.4E-
08
24.2
Hydrogen
[H
2
]
3737 2469 1269 415 854 88.9 67.3
7.8E-
04
5.6
1.2E-
05
1.2
4.2E-
07
4.2
8.7E-
09
8.7
Hydrogen
Chloride
[HCl]
4297 2749 1549 578 970 86.5 62.7
1.0E-
04
7.8
1.6E-
05
1.6
5.8E-
07
5.8
1.2E-
08
12.4
Hydrogen
Cyanide
[HCN]
3995 2598 1398 490 907 87.7 64.9
7.5E-
04
6.6
1.4E-
05
1.6
5.6E-
07
5.6
1.2E-
08
12.0
Hydrogen
Sulphide
[H
2
S]
3187 2194 994 255 739 92.0 74.4
5.6E-
04
3.4
7.0E-
06
0.7
2.5E-
07
2.5
5.3E-
09
5.3
Nitrogen
Dioxide
[NO
2
]
4237 2718 1518 561 958 86.8 63.1
7.5E-
04
7.5
1.6E-
05
1.6
5.6E-
07
5.6
1.2E-
08
12.0
Nitrogen
Oxide
[NO]
4877 3039 1839 748 1091 84.7 59.3
1.0E-
03
10.0
2.1E-
05
2.1
7.5E-
07
7.5
1.6E-
08
16.4
Oxygen
[O
2
]
6044 3622 2422 655 1767 89.2 73.0
8.8E-
04
8.8
1.9E-
05
1.9
6.5E-
07
6.5
1.4E-
08
14.2
51 PrimaX GB
7 Approvals