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SIKA Vortex

Precise flow measurement based on vortex shedding.

Alternate vortices rotating in opposite directions are generated behind a bluff body immersed in a flow. The vortices detach from the edges of the bluff body and form a Kármán vortex street in the fluid stream. The distance between the single vortices is constant. The frequency of the vortices flowing past a sensor depends on the flow rate and is proportional to the flow. The sensor detects these vortices which are then converted to an electrical frequency signal.

SIKA Vortex


Solid state flow sensor with no moving parts for liquids → no mechanical wear
Rugged glass fibre reinforced plastic ensures highest strength & performance
Completely encapsulated piezo-ceramic sensor to detect the vortices → no direct contact with the medium
Wide measuring span (1:20)
Temperature sensor integrated
High interference resistance
Wetted parts metal-free


Analogue voltage signal and / or pulse signal is available for the flow
Resistance or analogue signal is available for the temperature


Thread connection or QuickFasten

Models VVX15 VVX20 VVX15
Nominal diameter DN15 DN20 DN25
Flow range 2…40 l/min 5…80 l/min 7…150 l/min
Process connection G3⁄4-ISO 228
male, optional G1⁄2 QuickFasten G 11⁄4-ISO 228 male, optional G 1

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