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Flow is the third most measured value in industrial processes. Flow may be expressed as a rate of volumetric flow, mass rate of flow, or in terms of a total volume or mass flow.

Measurement is achieved primarily using a combination of two devices: a primary device that is placed in direct contact with the fluid and which generates a signal, and a secondary device that translates this signal into a motion or a secondary signal for indicating, recording, controlling, or calculating the flow. Other devices indicate or calculate the flow
directly through the interaction of the flowing fluid and the measuring device that is placed directly or indirectly in contact with the fluid stream.

SFW paddle wheel sensor consists of a freely rotating wheel with magnets which is perpendicular to the flow. As the magnets in the blades spin past the Hall sensor, a frequency and voltage signal which is proportional to the flow rate is generated.

SEKO's SFW range provides a low cost solution with high flow system accuracy, with no pressure drops making it ideal for gravity flows and offers a reduced dependence on flow, substances and film forming media. The SFW magmeter provides accurate data without moving parts for measurement of conductive and homogeneous dirty media.

SFW PVC-C
Simple and reliable paddle wheel flow sensor designed for use with every kind of solid-free liquids. It is a square wave output type transistor NPN open collector and two sensor lengths to cover from DN15 up to DN600. Suitable for drinking water, dish farming,
cooling tower, swimming pool, textile finishing.

SFW PVDF
Simple and reliable paddle wheel flow sensor designed for use with every kind of solid-free liquids. Square wave output type transistor NPN open collector and two sensor lengths to cover from DN15 up to DN600. Suitable for drinking water, dish farming, cooling tower, swimming pool, textile finishing.

SFW SS
Simple and reliable paddle wheel flow sensor designed for use with every kind of solid-free liquids. Square wave output type transistor NPN open collector and two sensor lengths to cover from DN15 up to DN600. Suitable for drinking water, dish farming, cooling tower, swimming pool, textile finishing.

SFWE
Are flow meters without moving mechanical parts which can be applied for the measurement of dirty liquids so long as they are conductive and homogeneous. Square wave output type transistor NPN open collector and two sensor lengths to cover from DN15 up to DN600. Suitable for drinking water, dish farming, cooling tower, swimming pool, textile finishing.