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Test & measurement


Simplifying double Sheet detection


To avoid the risk of cross contaminating samples or


evaporation, a cap can be pressed down over the well. This enables scientists to archive samples or perform long running tests using different solution concentrations to observe chemical changes in the samples. Additionally, an overmoulded seal clips down to ensure long term storage without risk of the sample leaking past the silicon wafer. Specac’s project leader Michael Ramsay explains more and


why the Arrow ATR warranted a patent: “The method of overmoulding the clipping mechanism on the slide and the process of removing slides from the spectrometry unit is very novel. From a productivity perspective, labs can now batch prepare and analyse over 25 samples in less than 10 minutes, with no cleaning of the puck between tests.” Citing the importance of analysing the composition of food


and drink commodities and ensuring samples are not cross contaminated, Michael expands: “In the food supply chain, brand integrity, authencity and traceability is critical. Correct labelling of calorific and nutritional content help consumers stay within recommended limits. This requires accurate quantification of the composition of food and drink to ensure full compliance with local labelling regulations. Quality control is stringent. These food analysis tests are typically performed in large batches, where speed and accuracy is critical.” Launched in July 2020, Broanmain has now scaled up into


full production of the Arrow puck and slides at its state-of- the-art Dorking facility. Operations manager Thomas Catinat comments: “It’s always exciting to be involved in such a revolutionary market development that has the potential to reshape how scientific communities will perform sample analysis in the future. As these processes become increasingly automated, innovations like the Arrow ATR will yield more accurate and reproducible results.”


Broanmain Plastics www.broanmainplastics.co.uk Instrumentation Monthly March 2021


more layers of materials such as foil, paper, cardboard, labels or even thin metal sheets can present complex challenges. If issues are not resolved they can lead to machine downtime, wasted materials and in some cases expensive repair costs. This can occur across a myriad of applications such as printing, packaging, automotive and finishing industries. Ultrasonic sensors usually provide


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the best solution such as those available from sensing and instrumentation specialist BAUMER. The latest addition to their range of high-performance ultrasonic sensors the U300, U500 and UR18, represents two product families which offer effective and extremely flexible solutions for double sheet detection across a wide range of materials. These new sensors offer important


functions and adjustment options which means they can be adapted to suit many double sheet detection applications, most important of which is a through beam sensor. The receiver of the through beam sensor is equipped with two binary switching outputs as well as an IO-Link interface and is designed to reliably detect the most common materials in the standard setting. However, if critical material


thicknesses occur the sensor can be adjusted for these more challenging demands through parameter configuration. In either IO-Link, or switching mode, the sensor reliably detects one, two or more layers of


ouble sheet detection where consistent and reliable detection of one or


materials such as foil, paper, cardboard, labels or thin metal sheets. In addition to double sheet


detection the sensors can also be used for film tear detection, bonding surface detection and also label detection which is where more diverse materials and varied thicknesses occur as well as more varied installation conditions. These situations are no problem


for Baumer ultrasonic sensors as the through beam can be easily adjusted to suit the materials and other critical factors, such as distance. Thanks to the IO-Link interface the


application parameters can be quickly and easily adjusted to suit the sound- absorbing materials. This ensures reliable detection with the process values related to the material being displayed to enable the switching thresholds to be set accordingly. To help with mounting the sensor,


the transmitter housing and the corresponding receiver can also be selected depending on the installation site. Also, it is possible to combine the cubic receiver (U500) with the cylindrical transmitter (UR18) which ensures optimum flexibility in the overall design of the detection system. To emphasise the flexibility, ease-of-


installation and reliability of these sensors all the variants of the U300, U500 and UR18 available from Baumer means that many other IO-Link parameters can be used by the through beam sensor to suit the widest range of application requirements.


Baumer www.baumer.com/ultrasonic


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