Star Instruments Ltd.

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.

FEATURES

• 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

OUTPUT SIGNALS

• Analogue voltage signal and / or pulse signal is available for the flow

• Resistance or analogue signal is available for the temperature