DEVICE DESCRIPTION
2
9
OPTIBAR 5060
www.krohne.com
04/2021 - 4005260702 - AD OPTIBAR 5060 Exta R02 en
2.5 Protection types
The pressure transmitter is designed with protection type dust - protection by enclosure
protection level "ta" according to EN 60079-31 or IEC 60079-31.
The marking according to ATEX is:
II 1D, 1/2D, 1/3D, 2D Ex ta ia, ia/tb, ia/tc, tb ia IIIC TX°C Da, Da/Db, Da/Dc, Db
II 1/2/-D, 1/2D Ex ia/ia/-, ia/tb ia IIIC TX°C Da/Db/-, Da/Db
The marking according to IECEx is:
Ex ta ia, ia/tb, ia/tc, tb ia IIIC TX°C Da, Da/Db, Da/Dc, Db
Ex ia/ia/-, ia/tb ia IIIC TX°C Da/Db/-, Da/Db
The marking contains the following information:
II
Explosion protection, group II
1
Equipment category 1
D
Dust ignition protection
Ex ta ia
The electronics and sensor housing are designed as protection type Ex ta (protection by
enclosure) for use in Zone 20, the pressure sensor is designed in Ex ia.
Ex ia/tb
Partition version: The electronics and sensor housing are designed as protection type Ex tb
(protection by enclosure) for use in Zone 21, the pressure sensor is designed in Ex ia.
Ex tb ia
The electronics and sensor housing are designed as protection type Ex tb (protection by
enclosure) for use in Zone 21, the pressure sensor is designed in Ex ia.
Ex ia/ia/-
Remote housing: pressure sensor Ex ia (Zone 20) / cable Ex ia (Zone 21) / electronics and
housing in non-hazardous area (-)
Ex ia/tb ia
Remote housing: pressure sensor Ex ia (Zone 20) / cable Ex ia, electronics and housing Ex
tb (Zone 21)
IIIC
Dust group, suitable for dust groups IIIC, IIIB and IIIA
1/2
Equipment category 1/2
1/3
Equipment category 1/3
2
Equipment category 2
1/2/-
Equipment category 1/2/ for remote version (pressure sensor category 1 /
cable category 2 / housing in non-hazardous area)
TX°C
maximum permissible surface temperature X°C
Da
EPL, suitable for zone 20
Da/Db
EPL, suitable for zone 20 / zone 21
Da/Dc
EPL, suitable for zone 20 / zone 22
Db
EPL, suitable for zone 21
Da/Db/-
EPL, suitable for Zone 20 / Zone 21 / housing in non-hazardous area
Table 2-1: Protection types