ATEX Labelling & meaning
Gas detection
computer
NDIR-Transmitter for combustible gases
Zone 0 and Zone 1
Range of application
Transmitter for
toxic gases and oxygen
Classification of zones
Ingress protection
Foreign bodies
protection
Category 1: very high safety level
Saftey guaranteed by 2 protective measurements /
with 2 independent apparatus faults
0
1
2
3
4
5
6
Application in zone 0, 1, 2 / 20, 21, 22 - Atmosphere G / D
Category 2: high safety level
Sufficient safety when apparatus faults occur often /
with 1 fault
Application in zone 1, 2 / 21, 22 - Atmosphere: G / D
Category 3: normal safety level
no protection
foreign bodies >50
foreign bodies >12,5
foreign bodies >2,5
foreign bodies >1,0
dust protected
dust-proof
Application in zone 2 / 22 - Atmosphere G / D
Addition to range of application
zone 0
dusts
Required marking
of installation
Equipment
group
Category
group
Equipment
protection level
II
1G
Ga
2G
1G
3G
2G
1G
Gb
Ga
Gc
Gb
Ga
II
1D
Da
II
2D
1D
Db
Da
3D
2D
1D
Dc
Db
Da
M1
M2
M1
Ma
Mb
Ma
zone 1
II
is not likely to occur in normal
operation but, if it does occur,
will persist for a short period
zone 2
II
is present continuously
or for long periods or
frequently
zone 20
is likely to occur in normal
operation occasionally
zone 21
is not likely to occur
in normal operation
but, if it does occur,
will persist for a short
period
zone 22
II
mines
I
mines
I
occassionally
-
methane
dusts
Examination
Certificate
according to
RL 94 / 9 / EG
Selection of notified bodies
according to guideline
94 / 9 / EG
Country
Notified body
Code
D
DEKRA
EXAM
0158
D
BAM
0589
D
PTB
0102
DK
DEMKO
0539
F
INERIS
0080
Apparatus may
be used in
IIA
Explosion
subgroup
IIA
IIB
IIC
IIB
IIC
T1
Function test
Maximum security for the operator is guaranteed, if gas
detectors are function-tested by accredited and
independent institutions (DEKRA EXAM).
The measurement function according to ATEX (DIN EN
60079-29-1) guarantees highest operational readiness
and exact measurements.
Ambient temperature Ta
Ta: -20°C ... +55°C
It is important to redeem to specific ambient temperature
ranges, as otherwise the specification of the temperature class
can not be guaranteed.
T2
methane ethane
propane i-butane
acetone toluene
ammonia propylene
ethylacetate
town gas
carbon monoxide
hydrogen
T3
T4
benzene cyclohexan hexane
kerosene
pentane
n-octane
nonane
ethylenoxide ethylene dimethylether
2-butene 1-propanol hydrogenbutadien 1,4-dioxane sulfide
n-butane ethanol
methanol i-pentane
isopropanol 1-butene
i-octane cyclopentane
acetylene
300°C
450°C
> 450°C
acetaldehyde
butyraldehyde
diethylether
dibuthylether
-
-
200°C
300°C
135°C
200°C
T1
T2
T3
Notified body
Explosion
protection
Ex
Year
According to
guideline
94 / 9 / EG
Principle of protection
Type of protection
Marking
May be used in
zone
CENELEC
transmitter
a propagation of an
explosion inside to the
outside is excluded
flammable
enclosure
„d“
Ex d
EN 60079 - 1
junction boxes,
cable glands,
transmitter
avoidance of arcs, sparks
and excessive temperature
increased
safety
„e“
Ex e
EN 60079 - 7
sensors
limitation of energy as well
as arcs and temperature
intrinsic safety
„i“
Ex ia
Ex ib
Ex ic
EN 60079 - 11
pressurisation
„p“
Ex p
EN 60079 - 2
encapsulation
„m“
Ex ma
Ex mb
EN 60079 - 18
oil immersion
„o“
Ex o
EN 60079 - 6
powderfilling
„q“
Ex q
EN 60079 - 5
Ex n
EN 60079 - 15
GB
SIRA
0518
GB
Baseefa
1180
I
CESI
0722
N
NEMKO
0470
transformers,
relays,
control stations
transformers,
relays,
condensers
NL
KEMA
0344
transmitter for zone 2
electronics within
transmitter
85°C
100°C
T4
T5
T6
Serial
number of
testing
ex-atmosphere keep at
distance from the ignition
source
ex-atmosphere keep at
distance from the ignition
source
ex-atmosphere keep at
distance from the ignition
source
ex-atmosphere keep at
distance from the ignition
source
see at the top only for zone 2
GfG Gesellschaft für Gerätebau mbH
Klönnestrasse 99
D-44143 Dortmund
Tel.: +49 (0)231 - 56 40 00
Fax: +49 (0)231 - 51 63 13
Worldwide Supplier Of Gas Detection Solutions
“non-sparking“
„n“
Requirements
Marking
without
restriction
-
special
condition may
be noted
X
2
-
0081
General requirements
1
For all application
LCIE
100°C
135°C
Restriction for using
apparatus
0
F
sulphide of
carbon
d e ia IIC T4 Ga BVS 09 ATEX E135 X
Protection types
switch- and
control cupboards,
analyse-apparatus
- - -
Apparatus may be used in
1G
Typical application
T5 T6
Temperature classes of gases and vapours according to the ignition temperature
Explosion
protection
 0158  II
Monitoring of production
0 no protection
mm 1 vertical falling wasser
mm 2 dripping water on apparatus
mm with slope 15°
mm 3 spraying water
4 splashing water
5 water jets
6 powerful water jets
7 temporary submersion
8 permanent submersion
Function-tested
multigas-detectors for up to 7 gases
Subdivision of gases and vapours
Flammable Temporary behaviour of Subdivision
substances flammable substances in of hazardous
hazardous places
places
gases
is likely to occur in
vapours normal operation
IP67
Water
protection
Sufficient safety during faultless operation
is present continuously
or for long perdiods or
frequently
Smart single-gas
detectors
EN 60079 - 0
Ex component,
which is not
intended to be
used alone and
requires
additional
certification
CE-Conformity
is declared by
the
manufacturer
if the part is
fitted into a
complete
device
U
As of 01.02.2010
Portable and fixed gas detection instruments
www.gasmessung.de