Sensors & transducers
extent, for example, the low external temperatures of the Swedish climate to achieve a cooling temperature of 0.5°C for the cooling circuit, which cools the produced cheese from 60 to 30°C. Yet energy losses that Arla had been unable to localise for some time occurred here as well. Abrahamsson explains: “The potentials of
the FlexFlow sensor caught our attention as soon as we heard about them. This sounded exactly like what we had been looking for.” “Baumer has been collaborating with Arla
Foods for many years,” reports Martin Leupold, product manager for process sensors at Baumer. “Our partnership dates back to the 1990’s.” The cooperation has seen the development
of a new process connection for milk production called Baumer Hygienic Connection, and this has effectively optimised the cleaning times. The temperature sensors from the CombiSeries product range were also created under the close collaboration between Arla and the Baumer Development Center in Aarhus in Denmark. “This close collaboration is allowing us to get to know our customers’ pain points,” explains Leupold. “And we can use that knowledge to develop or suggest products that actually optimise their processes in a sustainable manner.” To solve the problem of monitoring energy
consumption, the choice fell to the FlexFlow sensor because it could easily be integrated into the existing plant and is able to measure both flow and temperature.
Simplicity
The simple installation of the FlexFlow sensor is down to the symmetrical and centred design with one sensor element ahead of the sensor tip, which allows the sensor to be optimally installed in the process regardless of installation position and orientation. “We want our portfolio to make
commissioning as easy as it can be for our customers”, says Leupold. “This allows them to spend their precious time on what actually needs to be done.” The flow sensor has a robust stainless steel housing that accommodates all the electronics, so there is no need for complex wiring or control cabinet installation. The FlexFlow also meets the requirements for
protection class IP 68 (Baumer proTect+), making this sensor, together with the materials used, the perfect solution for hygienic applications. One exceptional feature is its maximum temperature range to 150°C, which also qualifies it for Sterilisation-In-Process (SIP) tasks. Arla has already installed around 15 of these flow sensors in the cooling circuit and
heating system. The plan is now to also integrate these sensors into the CIP return line to monitor and optimise the energy consumption there as well. Abrahamsson concludes: “This has proven to be
a cost-efficient solution. And because the sensors installed so far are reliably returning the results we need, we will now install more and more of them.” Leupold adds: “This solution is allowing Arla,
our long-term partner, to systematically optimize its energy consumption, save resources and deliver on its sustainability promises. We, at Baumer, are working on these very solutions.”
Baumer
www.baumer.com NoN-coNtact haNd detectioN iN automatic saNitisers E
verybody knows them, and right now they are more in use than ever: automatic hand sanitisers. Inside, optical miniature sensors with background
suppression from Baumer ensure reliable and safe hand detection at switching distances from 15mm to 300mm, at any angle of incidence and even when the viewing window is soiled. And all this for the entire device lifetime. Adjustable switching delays also prevent multiple or unwanted spray bursts. Thanks to the high immunity to ambient light, there are no restrictions to the sensor functions even in very bright environments. Integration into the dispenser housing is made easy by
the large variety of compact sensor designs. For example, further to the cylindrical OR18 sensors with M18 thread, the rectangular miniature housings of the O200 and O300 series are available with robust M3 threaded sleeves or spacer sleeves. The switching distance can be easily and reproducibly adjusted to individual conditions. Optional variants with fix ranges are available ready-to-use. The main benefit of Baumer miniature sensors: switching distance with lifetime safety.
Instrumentation Monthly August 2020 23
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