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Dräger PIR 7000 Type 334 cross sensitivities
The Dräger PIR 7000 Type 334 gas transmitter measures the concentration of many hydrocarbons.
It is not specific for the substances that are saved at the factory with their characteristics. Different
substance-specific sensitivities must be taken into account for specifying cross-sensitivities.
Typical values for some hydrocarbons are given below as examples.
NOTICE
The factory default settings for the LEL values may vary. These parameters must therefore
be checked before commissioning and modified as necessary.
Substance
CAS no.
GasCode
LEL
1)
[vol. %] as per
Recommended
category gas
LEL asper IEC
[vol. %]
Display for 50 %LEL
to %LEL
of the category gas
2)
NIOSH
IEC
PTB
RUS
Acetone
67-64-1
453
2,5
2,5
2,5
2,5
Ethylene
2,3
72
Allyl chloride
107-05-1
723
2,9
2,9
3,2
2,9
Ethylene
2,3
68
Benzene
71-43-2
260
1,2
1,2
1,2
1,2
Ethylene
2,3
78
n-butane
106-97-8
104
1,6
1,4
1,4
1,4
Propane
1,7
38
i-butane
75-28-5
114
1,6
1,3
1,5
1,3
Propane
1,7
29
1.2-dichloroethane
107-06-2
732
6,2
6,2
4,2
6,2
Ethylene
2,3
85
Dichlormethane
75-09-2
730
13,0
13,0
3)
13,0
13.0
4)
Ethylene
2,3
74
1.2-dichlorpropane
78-87-5
734
3,4
3,4
3,1
3,4
Ethylene
2,3
87
1.3-dichlor-1-propene
542-75-6
744
5,3
5,3
5,3
5,3
4)
Ethylene
2,3
72
Epichlorhydrin
106-89-8
820
3,8
2,3
2,3
2,3
Ethylene
2,3
97
Ethanol
64-17-5
302
3,3
3,1
3,1
3,1
Propane
1,7
54
Ethyl acetate
141-78-6
552
2,0
2,0
2,0
2,2
Propane
1,7
54
Ethylene oxide
75-21-8
822
3,0
2,6
2,6
2,6
Propane
1,7
47
n-hexane
110-54-3
106
1,1
1,0
1,0
1,0
Propane
1,7
30
Methyl ethyl ketone (MEK)
78-93-3
454
1,4
1,5
1,5
1,8
Propane
1,7
32
Methanol
67-56-1
301
6,0
6,0
6,0
5,5
Propane
1,7
>100
1-methoxy-2-propanol
107-98-2
391
1,6
1,6
3)
1,8
1,6
4)
Propane
1,7
36
Methyl-i-butyl ketone
108-10-1
476
1,2
1,2
1,2
1,2
Propane
1,7
23
Methyl chloride
74-87-3
701
8,1
7,6
7,6
7,6
Propane
1,7
63
n-nonane
111-84-2
109
0,8
0,7
0,7
0,7
Propane
1,7
22
n-octane
111-65-3
108
1,0
0,8
0,8
0,8
Propane
1,7
27
n-pentane
109-66-0
105
1,5
1,1
1,1
1,4
Propane
1,7
40
i-propane
67-63-0
313
2,0
2,0
2,0
2,0
Propane
1,7
39
Propylene
115-07-1
153
2,0
2,0
2,0
2,0
Propane
1,7
40
Propylene oxide
75-56-9
823
2,3
1,9
1,9
1,9
Propane
1,7
62
Styrene
100-42-5
270
0,9
1,0
1,0
1,1
Ethylene
2,3
64
Toluene
108-88-3
261
1,1
1,0
1,0
1,1
Propane
1,7
28
o-xylene
95-47-6
265
0,9
1,0
1,0
1,0
Ethylene
2,3
95
1) The conversion factors for vol. % to %LEL are are based on the NIOSH Pocket Guide for LEL category 1, IEC 60079-20 for LEL category 2, Brandes / Möller - Technical Safety Parameters, Volume 1: Flammable Liquids and Gases
(ISBN 3-89701-745-8) for LEL category 3 and GOST R 51330.19-99 for LEL category 4. The LEL values based on LEL category 5 LKLV (Lowest Known LEL Value) always represent the minimum of the four other LEL values.
2) Relative to LEL values according to IEC, typical tolerance: ±5 %LEL.
3) There is no conversion factor from vol. % to %LEL for this substance in the listed reference. The specified value represents the value shown in the parameter (as minimum value of all other conversion factors).
4) There is no conversion factor from vol. % to %LEL for this substance in the listed reference. The specified value represents the LEL value according to IEC.
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