18 FLOWSIC100 Flare · Operating Instructions · 8013344/11L2/V 2-5/2018-10 · © SICK Engineering GmbH
Important Information
Subject to change without notice
Application limitations for use in hazardous area classification Ex zone 1
The following additional regulations are applicable for the use of FLOWSIC100 Flare in
applications with Ex zone 1:
Ultrasonic probes made of titanium may be used in zone 1 only when risks of ignition
arising from impacts or friction on the sensor housing can be ruled out.
When ultrasonic probes are installed in pipelines with a defined hazardous area, solid
parts, e.g. dust or other particles may not cause an ignition hazard.
Application limitations for use in hazardous area classification Ex zone 0 in the pipeline
The use in applications of zone 0 is generally possible only for device types
FLOWSIC100
EX-S and EX-PR under consideration of the application limitations specified
in these Operating Instructions.
● Ultrasonic probes can also be operated in zone 0 under atmospheric condi-
tions (ambient temperature -20°C to 60°C and ambient pressure 0.8 bar
to 1.1 bar absolute). The device must be labelled at least with the informa
-
tion II 1/2 G Ex ia.
● Ultrasonic probes made from titanium may be used in zone 0 only if the
medium does not contain firm parts (e.g. dust and other particles), and the
ultrasonic probes are installed in the zone 0 (e.g. the inside of a pipe) in
such a way that the danger of ignition due to impact or friction is excluded.
The intrinsically safe ultrasonic transducers with their gas-tight and pres
-
sure-proof housings must be installed gas-tight and pressure-tight in the
wall separating the zones to zone 0. The wall must be thicker than 3 mm.
The requirements in EN 60079-26 section 4.6 must be adhered to.
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