Selection Of Detectable Gases And Vapours - Dräger Polytron SE Ex PR NPT1 DD Instructions For Use Manual

Selection of detectable Gases and
Vapours
The table below is not necessarily complete. It lists only
those gases and vapours that have been subjected to
performance testing complying with EN 60079-29-1.
The sensing heads can also detect other substances
not listed here. The typical sensor signals detected ap-
ply to unused sensors and can fluctuate by up to
± 30 %. The lower explosion limits given here are taken
from IEC 60079-20-1:2010, in specific regions, other
lower explosion limits may be compulsory.
Sensing heads Polytron SE Ex PR M1/2/3 DD,
SE Ex PR NPT1 DD and Polytron SE Ex HT M DD
Gas or vapour
(Gases indented)
Acetone
Acetylene
Ammonia
Benzene
1.3-Butadiene
n-Butane
n-Butyl acetate
Diethylether
Dimethylether
Ethanol
Ethyl acetate
Ethylene (Ethene)
Ethylene oxide
n-Hexane
Hydrogen
Methane
Methanol
Methyl methacrylate
Methylethylketone
n-Nonane
n-Octane
n-Pentane
Petrol 065/095
Propane
i-Propanol
Propylene (Propene)
Propylene oxide
Toluene
o-Xylene
1) Response times acc. to EN 60079-29-1, Appendix B, B.2.3.1 (diffusion mode without directed flow).
2) Response times acc. to EN 60079-29-1, Appendix B, B.2.2 (span gas applied by calibration adapter).
CAS-No. LEL
in
% V/V
67-64-1 2.5
74-86-2 2.3
7664-41-7 15.0
71-43-2 1.2
106-99-0 1.4
106-97-8 1.4
123-86-4 1.2
60-29-7 1.7
115-10-6 2.7
64-17-5 3.1
141-78-6 2.0
74-85-1 2.3
75-21-8 2.6
110-54-3 1.0
1333-74-0 4.0
74-82-8 4.4
67-56-1 6.0
80-62-6 1.7
78-93-3 1.5
111-84-2 0.7
111-65-9 0.8
109-66-0 1.1
--- 1.1
74-98-6 1.7
67-63-0 2.0
115-07-1 2.0
75-56-9 1.9
108-88-3 1.0
95-47-6 1.0
Typical sensor Response time
signal at 50 in seconds at
%LEL in mV 255 mA
at 255 mA t50
37.8
43.1
71.1
30.7
33.4
32.8
24.2
32.9
38.5
39.5
30.7
41.3
35.1
26.7
51.0 4
60.0 5
49.3
30.7
28.4
21.5
23.7
27.2
30.2
35.0 4-6
32.7
41.3
32.6
27.0
27.9
1)
Response time
in seconds at
255 mA
t90 t50 t90
7-10 15-18
7-10 15-18
7-9 12-15
10-13 22-26
9-11 19-22
9-12 20-24
12-15 28-31
11-14 25-28
8-10 18-20
9-12 20-22
12-14 23-28
7-10 16-19
7-11 17-20
11-13 23-27
11 5-7 10-13
8-10 7-9 14-17
9-10 18-21
10-12 23-26
11-12 22-25
13-14 27-33
12-14 25-29
11-13 25-31
10-13 22-26
9-13 8-11 18-23
9-12 20-23
7-11 17-20
10-12 20-23
10-12 24-28
12-13 29-35
2)
41