In-line flow measurement device with meter, switch and display

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In-line flow measurement device with meter, switch and displaySick (UK) is launching the FFU in-line flow measurement sensor that uses modern ultrasonic flow measurement principles to deliver accurate flow and volume measurements with conductive or non-conductive fluids.

The FFU combines a flow meter, switch and display in a single compact unit. Capable of measuring the flow of fluids with a wide range of temperatures, viscosities and densities, the FFU is suitable for flow control systems in machine tools, hydraulic circuits, cleaning machines and CIP systems.

With a seal-free design and no moving parts, the FFU is maintenance-free, which makes it reliable and cost-effective. Furthermore, the sensor tube is manufactured from a highly stable polysulfone (PSU) thermoplastic material that is suitable for use with a wide range of chemicals.

Sick is offering the FFU flow meter in four sizes, covering pipe diameters between 10mm and 25mm and flow rates up to 240litres/min with a +/-2 per cent accuracy. The FFU is also available EHEDG-certified for use within hygienic environments.

Ease of use

The FFU features a large display and intuitive menu structure that make it easy to configure. The units shown on the display are user-selectable for litres/min, ml/s or gallons/hour.

For communication of data to a PLC, the FFU provides a 0/4–20mA analogue signal and a digital NPN/PNP output. The digital output can be configured for empty pipe detection, low/high flow rate indication or as a pulse output. When configured as a pulse output, the FFU can simulate the electrical output of oval wheel flow sensors, which makes the FFU an maintenance-free substitute for mechanical flow sensors.

Darren Pratt, the UK instrumentation product specialist at Sick, comments: "While stainless steel has traditionally been the material of choice for sensing tubes, we have carried out extensive testing and the PSU material has proven to be extremely tough as well as very easy to clean in hygienic applications. The thermoplastic material is also highly resilient to mineral acids, alkalis and electrolytes.

"In addition, the ultrasound transmitters and detectors are located behind the pipe wall. This negates the potential of sensors protruding into the pipe, often the case with ultrasonic flow sensors with metal pipes, therefore removing the risk of contamination or pressure loss."

Contact Sick (UK) for more information about the FFU in-line flow measurement device.

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