Distillation Process Analyzer DPA-4.5
Safety
Meaning of marking
according to ATEX 94/9/EC
Marking
Meaning
Device group II
The device may be used in potentially
explosive atmospheres, except for those in
mining.
Category 2
A potentially explosive atmosphere may
occasionally occur. The device ensures a
high degree of safety and can be used in
zone 1 and zone 2.
G
Materials which form a potentially explosive
atmosphere and are gases, mist or vapors
(not dust).
IIC
Classification of gases and vapors into the
subgroups IIA, IIB and IIC depending on
their potential to ignite. The explosion
protection of the device permits use with
subgroup IIC.
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: For use in zone 1. Pressurization in the
box ensures that the atmosphere inside is
not explosive.
[ia], [ib]
[ia]
: Intrinsically safe electrical circuits lead
out of the box. They cannot result in a
potentially explosive atmosphere being
ignited, even if two faults occur
simultaneously.
[ib]
: Intrinsically safe electrical circuits lead
out of the box. They cannot result in a
potentially explosive atmosphere being
ignited, even if a fault occurs.
T4
Classification of gases and vapors
depending on their ignition temperature into
the classes T1 to T6 (in accordance with
IEC 60079-4). The device has been
designed for use with gases and vapors of
temperature class:
T4
: 135 °C < ignition temperature < 200 °C
Gb
Gb
: The device ensures a high degree of
safety. It can be used in zone 1 and in zone
2. A potentially explosive atmosphere may
occasionally occur.
December 2013
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