Feature sponsored by Flow, level & control


ensure product quality and protect assets downstream, operators rely on accurate data to plot trends and identify any potential problems with the filter. A fast reaction to any chlorine spikes or other issues is critical for reducing often costly impacts on the process and wider operations. The problem is that the solutions used to monitor chlorine haven’t offered the responsiveness required for this task. Traditional amperometric sensors rely on electrodes to detect chlorine, while colorimetric analysers mix samples with a reagent, allowing colour depth to be assessed. Both offer a T90 time of around two to three minutes – insufficient to facilitate fast operator decision-making. Every second lost increases the likelihood of damage to equipment or processes downstream Bürkert’s OALAB Type 8906 water analysis system overcomes these limitations. Harnessing the amperometric cell technology of its installed MS02 Chlorine Cube, OALAB provides a T90 time of 30 seconds or less, with some users reporting almost instantaneous read outs. The increased speed of OALAB means operators can react faster to changes in chlorine levels, helping to reduce contamination risks and chlorine contact time for assets such as reverse osmosis (RO) or electro-deionisation systems downstream. It also ensures better decision-making regarding carbon filter capacity, programming changes, backwashes and maintenance.


T


LESS MAINTENANCE AND RECALIBRATION COSTS The MS02 in OALAB is an inherently low maintenance solution compared to its competitors. Traditional amperometric sensors are notorious for heavy elements forming on the working amperometric electrodes, causing scaling and compromising their function. To remove build up, maintenance personnel are required to uninstall the electrode and scrape it with abrasive paper.


The MS02 has no such issues. A membrane above its cell stops heavy element deposits, helping operators avoid fiddly and time- consuming maintenance. When pitted against colormetric analysers, the MS02 has the advantage of requiring no reagents for detecting chlorine, so operators don’t need to spend time reordering and replenishing reagents for the analyser. Whether detecting free or zero-chlorine, long term accuracy is of paramount importance in a GAC monitoring application. Unfortunately, traditional amperometric sensors have multiple issues that can cause chlorine measurement drift. For example, the electrolyte used for pH buffering degrades over time, leaching into the water and affecting results. It can also become


72 October 2024 Instrumentation Monthly


here are two aspects to monitoring a GAC filter. At the inlet, the amount of free chlorine from the water supply needs to be recorded, while at the outlet, the absence of chlorine (referred to as zero- chlorine) must be measured. To


SIMPLIFYING CHLORINE


MEASUREMENT FOR INDUSTRIAL CARBON FILTERS


Common in pharmaceutical, food and beverage applications, industrial high-rate granular activated carbon (GAC) filters remove chlorine from water supplies, safeguarding product quality and sensitive equipment downstream. Measuring their effectiveness relies on accurate monitoring at the inlet and outlet of the vessel, but many of the traditional solutions for this are slow and maintenance intensive. In contrast, Bürkert’s OALAB Type 8906 water analysis system takes fast and precise measurements, increasing data accuracy while reducing recalibration and maintenance requirements.


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74  |  Page 75  |  Page 76  |  Page 77  |  Page 78  |  Page 79  |  Page 80  |  Page 81  |  Page 82  |  Page 83  |  Page 84  |  Page 85  |  Page 86  |  Page 87  |  Page 88  |  Page 89  |  Page 90  |  Page 91  |  Page 92  |  Page 93  |  Page 94  |  Page 95  |  Page 96