Possible areas of application
SIKA VVX40 flow sensors are used for measuring water flow at medium and high measurement ranges.
One such application area is large heat pumps.
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.
|Nominal diameter||DN 40|
|Measuring range (flow)
|Accuracy (flow)||±2 % of range*, deviations with high viscous media|
|Process connection||G 2-ISO 228 male, incl. O-rings|
|Measuring range (temperature)
|Pressure rating||PN 16|
5...90 °C -20...90 °C**
|Frequency output||Frequency signal, square wave, pulse duty ratio 50:50, signal current max. 20 mA|
Output signal flow
|Power supply||8...30 V DC or 5 V DC (±5 %) or 12...24 VDC****|
|Electrical connection||5-pin plug connector M12 x 1|
|Degree of protection EN 60529||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
Further details and accessories can be found in the data sheet.