SDE_U14 Chapter 1: Description of functions 1-7
Ex concept
˝
Application The Uras 14-Ex analyzer module is capable of measuring non-combustible and
combustible gases under atmospheric conditions which can form an explosive
environment (Zone 1).
Design For use in Zone 1 and Zone 2 (combustible measurement gas) the analyzer module
is installed in a pressure-tight cylinder.
The analyzer module consists of the following components:
• Flange on which the analyzer is mounted
• Cylinder with threaded cap, the cylinder screws into threads in the flange.
All electrical and gas connections are made through the flange.
• Power supply and system bus lines are routed through pressure-tight cable
openings.
• Gas inlet and outlet lines are routed through flame traps.
Figure 1-4
Ex module
Housing purge To protect the analyzer module sensor electronics against the entry of an
aggressive atmosphere or corrosive sample gas components, a purge gas can flow
through the pressure-tight cylinder.
The purge gas is routed in and out via two flame traps.
Identification EEx d IIC T4
Certification of
compliance
BVS 97.D.2021 X
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