Page 5 - Industrial Technology EXTRA 27th July 2020

the local telemetry to provide One of the major
near real-time analysis of water benefits to this system
quality. The 8905 uses analysis is its ability to test
cubes that are automatically samples from two
calibrated when they are inserted different locations, such
into the base unit and carry out as pre and post
repeated testing as often as treatment. This enables
required. any chemical dosing
system to be optimised
Improved accuracy using a closed loop
The key point in any water control system that
analysis process is repeatability, would also reduce
i.e. the accuracy of the results, chemical costs. This
which can be somewhat variable also offers the capacity
when the manual tests are carried to identify situations
out by different staff. This is where part of the
especially true for low iron treatment process has
content volumes, which can be been overwhelmed or
difficult to establish accurately. failed. With the ability
The 8905 can deliver accurate to identify the problem
results down to 0.03 ppm by and communicate it
volume. with the wider control
Tests carried out in the network, the 8905
Netherlands showed where also offers peace of
samples were measured mind.
before and after a filtration system
was installed. The samples taken by hand were Self-contained calibration
subject to considerable variation, compared to the The on-board technology in the 8905 offers a range
continuous measurement provided by Bürkert’s iron of precise testing solutions in a single, compact
sensor (MS06), see figure 2. system. In addition, Bürkert has built in the
Clearly the time between manual tests can allow cleaning and calibration processes necessary for a
spikes in a parameter to escape unnoticed, robust and reliable analysis system. Depending on
particularly if samples are only taken daily or even the parameters selected, there is little or no
less frequently. For Bürkert, iron content can be maintenance intervention required.
tested automatically, without human intervention To help potential customers to appreciate the
every 30 minutes, allowing action to be taken benefits of the Type 8905, Bürkert has made a
quickly if the values exceed pre-set thresholds. number of units available for rental. This means
Furthermore, whereas some iron analysis that a trial unit can be installed and commissioned
equipment can require extensive maintenance by Bürkert’s experts to customer requirements and
interventions to keep it operational, the 8905 has assessed in terms of performance and accuracy.
almost no need of external support. www.burkert.co.uk

July 2020 • INDUSTRIAL TECHNOLOGY EXTRA! • p5