WIKA NS 100 Mode D'emploi page 15

2. Safety
ID Marking Designation
A CE marking
B Specific marking for
explosion protection
C II Symbol of the
equipment group
2 Symbol of the
D
equipment category
E G Ex atmosphere
D Ex atmosphere
1 Ex Ex marking
h Ignition protection type
2
3 IIC Suitable atmosphere
IIIC
4 TX Maximum surface
temperature
WIKA operating instructions pressure gauge, model 2 per ATEX
Meaning
European conformity
Ex symbol
Equipment intended for use in other places
than underground parts of mines, and in
those parts of surface installations of such
mines, liable to be endangered by firedamp
and/or combustible dust and an explosive
atmosphere.
High safety, approved for zone 1 and 21.
For areas in which explosive gas, vapour,
mist or air mixtures are present.
For areas in which explosive atmospheres
caused by dust can form.
Standards ISO 80079-36 and ISO 80079-37
applied.
Non-electrical equipment for use in explo-
sive atmospheres.
An ignition protection type is not applied to
the letter "h".
Gas atmosphere group IIC.
Combustible flyings, non-conductive dust
and conductive dust.
Symbol indicating the temperature class.
The actual maximum surface temperature
depends not on the equipment itself, but
mainly on the operating conditions.
EN
15