Electricity + Control June 2015

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take note
• Floats can provide information on current liquid levels in
most sectors of industry.
• The use of floats is particularly dependent on the physical
and chemical process conditions (pressure, temperature,
density and viscosity of the medium).
• An advantage of float-based level measurement is that it is
not influenced by moving surfaces, electrical conductivity,
dielectric constants, foaming and boiling surfaces.
Despite more modern
measuring techniques such as radar
or ultrasonics, floats can still claim
their place within the wide subject of
liquid level detection.
PRESSURE + LEVEL MEASUREMENT
Mathias Jung is in product management and Johanna Zieser is in
marketing and product management – both at KSR Kuebler Niveau-
Messtechnik AG – a division of the WIKA Group.
Enquiries: Tel. 011 621 0000 or email
exhibit good cleanability, to enable CIP (cleaning
in place)/SIP (sterilisation in place) processes. It
is crucial that the design of the measuring instru-
ment meets the standards for food and pharma-
ceutical industries. Design requirements such
as adherence to certain materials, fully-welding,
elimination of dead space, specific radii and sur-
face finish quality are consequently prerequisites
for applications in sterile process engineering.
Finally, it should be noted that the hygienic de-
sign sensors are certified in accordance with the
74 – 06 3 A sanitary standards (available as float
switches, reed sensors and magnetostrictive sen-
sors) (see Figure 3).
Figure 3: Hygienic design sensors are certified in
accordance with the 74 – 06 3 A sanitary stand-
ards.
Conclusion
The experience from numerous applications offers the user a wide
range of method and process-specific solutions − in the field of sani-
tary applications, too − all built around a range of standard products.
Last but not least, also as a result of the unique design and the large
variety of materials, in spite of the strong competition by other meth-
ods, float measurement technology still asserts itself in the market.
Compact indicator with salt water resistance
Resistance to salt water and high humidity conditions is not only
critical in the marine industry but in all industries with high tem-
peratures and high humidity environments. With the new plastic
housing used in the RIA15, Endress+Hauser rounds off its indicator
portfolio ensuring further successes.
Plastic housing material
The RIA15 loop powered indicator already offered almost all the
features that are required in themarine and related industries. These
include the German Lloyd and Ex approvals, a very low voltage drop
of ≤ 1V, small dimensions of the field housing, good readability of
the display as well as an optional backlight.
However, there are very high requirements on the resistance to
salt water in the marine industry. With the new plastic housing of
the RIA15 Endress+Hauser is now able to fulfill this requirement
at a cost-effective price.
Integrated metal fibres for conductivity
Often plastic device housings do not offer Ex approvals, due to
conductivity reasons. The RIA15 with the brand-new plastic mate-
rial with integrated metal fibres shows an excellent conductivity
and due to this dangerous electrostatic charging can be avoided.
Thus, the device can be offered with international Ex approvals.
Furthermore the metal fibres increase the robustness of the hous-
ing compared to other standard plastic materials.
Right approvals
The RIA15 in the plastic housing does not only possess Ex approv-
als like ATEX, CSA, FM and IECEx. The device can also offer the
German Lloyd marine approval and shows an IP66 protection class.
That’s why the indicator is very flexible in application.Furthermore
the indicator is SIL interference free and so it also can be used in
safety relevant uses.
Complete indicator portfolio
With the new plastic housing for the loop powered indicator RIA15
Endress+Hauser completes the redesign of its indicator portfolio.
Endress+Hauser is able to offer a complete portfolio of state-of-the
art indicators with various housing versions, international approvals
and all important communication protocols.
Enquiries: Benjamin Mlangeni.
Tel. 011 262 8000 or email
ROUND UP
Electricity+Control June ‘15 16