ProMinent Sigma 3 Basic Operating Instructions Manual page 7

Tab. 1: Division of gases into explosion groups and temperature classes
T4
IIC -
IIB Ethyl ether
IIA Acetaldehyde
Type of explosive atmosphere
G Mix of air and gases, vapours or mist
Areas at risk of explosion label
Ex in accordance with EN ISO 80079-36, -37
Type of protection
h non-electrical device
Explosion group
IIC
IIB
T3
-
-
Benzine,
Diesel fuel,
Aircraft fuel,
Heating oils,
n-hexane
Group IIC gas - refer, for example, to
sion of gases into explosion groups and temperature
classes' on page 7
Group IIB gas - for example
gases into explosion groups and temperature classes'
on page 7
Temperature class
T3 Max. surface temperature: 200 °C
T4 Max. surface temperature: 135 °C
Equipment protection level (EPL)
Gb high EPL in normal operation and in
the event of expected errors (corre‐
sponds to category "2G".)
Gc normal EPL in normal operation (corre‐
sponds to category "3G".)
Suffix X
X Special conditions - refer to the
Declarations of Conformity and
EC-type examination certifi‐
cates
T2
Acethylene
Ethylene
Ethyl alcohol,
n-butane,
n-butyl alcohol
Identity code
Ä Tab. 1 'Divi‐
Ä Tab. 1 'Division of
T1
Hydrogen
Mains gas (coal gas)
Acetone,
Ammonia,
Benzene (pure),
Acetic acid,
Ethane,
Ethyl acetate,
Carbon oxide,
Methanol,
Propane,
Toluene
7