Flow, level & control
reagent behaves in a lab setting. Returning to a time-pressure dosing technique, mircrovalves with sufficient precision can achieve 10 µs (microsecond) control signal steps with less than one per cent deviation of the target figure. If greater precision and accuracy are required, a closed loop system can be introduced. Here, flow meters that operate on the Coriolis principle remain the standard. This technique uses the vibrations of a liquid-carrying tube that are measured to calculate flow based on mass. Bürkert’s latest mass flow meter with an integrated differential pressure sensor achieves precision down to 50 nl (nanolitres), with repeatable accuracy lower than one per cent deviation. When this level of precision is reached, communications integration to capture real-time data is essential to fine-tune control, as well as identifying wider trends to optimise system automation.
Instrumentation Monthly October 2025
FLUID CONTROL EXPERTISE While the requirements between macro-level batching and micro-level dosing are diverse, the needs of each application, the properties of the liquid in question, as well as the environment of use, all require careful analysis. Not only can these attributes introduce challenges such as hygienic conformance or system durability and lifetime, but they can also impact precision and accuracy.
The selection of the control valve for a dosing system is made to optimize control characteristics, orifice size and actuation type, while being materials compliant and in accordance with industry standards such as FDA and USP class VI. In conjunction with valves, measurement devices, and controls that are tested to achieve optimal precision and accuracy, it’s essential to integrate
the right design and seal materials. This requirement expands when manifold integration is also required, and here, materials selection is key, especially when considering a multi-channel design. From industry expertise in the food and beverage sector, down to microfluidics and lab automation, Bürkert’s engineering approach ranges from providing solenoid valves through to a complete turnkey system, specified and supplied to meet specific application demands. Combining the optimised choice of fluid control hardware, along with the control integration that delivers the benefits of an automated system, Bürkert’s holistic approach can be scaled to macro- and micro-levels of dosing system to deliver the most precise and accurate results.
Bürkert Fluid Control Systems
www.burkert.co.uk
25
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
