On behalf of Ron van Dooren, Flowmeister BV

Let’s have a look

On average, a turbine flow meter can be expected to achieve an accuracy of approximately ±2% of the measured value.

To answer this question, let us consider the measurement of water or water-like liquids in machinery and equipment requiring flow rates up to 2.5 l/min.

For the turbine flow meter itself, it makes no difference whether the medium is drinking water, Ultra-Pure Water (UPW), Water for Injection (WFI) or any other.

The performance of a flowmeter depends not only on the sensor itself, but also on installation conditions and variations in flow rate.

For this type of application, Digmesa AG offers a smart and compact solution with the NANO Flex.

With an internal passage diameter of 3 mm, the meter comfortably covers flow rates up to 2.5 l/min.
A dual-supported micro turbine converts the flow rate into a nominal 2580 pulses per liter.

Thanks to its inline design and integrated AVS Römer 8 mm push-in connection, the flow meter can easily be installed into a straight section of tubing or piping.
This not only simplifies installation and improves operational safety, but also benefits the flow-profile and therefore overall measurement performance.

The upper graph illustrates how the measurement deviation develops across the complete flow range from minimum to maximum flow rate.

As a general rule, instrument sizing should allow for some additional measuring capacity above the maximum expected flow rate. In this case, temporary peaks up to 3 l/min are still measured reliably.

The 3 mm internal diameter represents a reduction in the flow path and therefore introduces a certain pressure drop. This is shown in the lower graph.

Conclusion

For water flow measurement in the range of 0.25 to 3 l/min, the NANO Flex from Digmesa AG provides a compact, accurate, and maintenance-free solution for long-term reliable operation in machine and equipment engineering.