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. Some of the advantages of this measuring principle:
Our Vortex VVX series flow sensors offer the following compelling features:
SIKA VVX15 flow sensors are used for measuring water flow at low and medium measurement ranges. One such application area is heating systems.
Temperature ranges
Medium Ambient
5...90 °C -20...90 °C** 5...70 °C → Repeatability ±0,5 %, -20...5 °C → Repeatability ±1 %
Analogue output
Output signal flow
0.5...3.5 V 0...10 V or 4...20 mA
* Test conditions: See data sheet ** Temperature cycle test: See data sheet *** With attached cable socket only **** Only available for output signal flow 4...20 mA and 0...10 V Options
Recognized component ETL according to UL & CSA standards available on request
SIKA VVX20 flow sensors are used for measuring water flow at low and medium measurement ranges. One such application area is heating systems.
5...90 °C, -20...90 °C** 5...70 °C → Repeatability ±0,5 %, -20...5 °C → Repeatability ±1 %
IP65***
* Test conditions: See data sheet ** Temperature cycle test: See data sheet *** With attached cable socket only **** Only available for output signal flow 4...20 mA and 0...10 V
Options
** NEW ** Vortex flow sensor Type VVX32
SIKA VVX32 flow sensors are used for measuring water flow at medium and high measurement ranges. One such application area is large heat pumps.
-20...90 °C -20...70 °C
* Test conditions: See data sheet ** With attached cable socket only *** Only available for output signal flow 4...20 mA and 0...10 V
SIKA VVX40 flow sensors are used for measuring water flow at medium and high measurement ranges. One such application area is large heat pumps.
* Test conditions: See data sheet *** With attached cable socket only **** Only available for output signal flow 4...20 mA and 0...10 V