Turbine flow sensor Type VTM25


Product description

Possible areas of application Turbine flow sensor Type VTM 25

SIKA VTM25 turbine flow sensors are used for flow measurement and dosage in water and water mixtures, and are used in many applications such as:

  • Monitoring cooling circuits in machine and plant engineering
  • Water treatment
  • Cleaning processes
  • Dosing



Measuring principle
The liquid flowing into the turbine flow sensor is split into individual jets by the guiding blade. These jets hit the rotor evenly from different directions, setting the rotor in motion. The rotation speed of the rotor is then converted to an electrical pulse signal (frequency): The rotor is fitted with magnets and a Hall effect sensor detects the rotation of the rotor.
A flow-proportional frequency signal (square-wave signal) is made available.
The construction of the guiding blade and rotor enables to realize the very low start-up flow values.

Technical features

Technical features

For higher pressure, plug connection
Material pipe section
Stainless steel
Measurement range 4...160 l/min - with continuous operation max. 80 l/min
Accuracy ±5 % of measured value (up to 5 l/min 7 % of measured value)
Reproducibility ±0.5 %
Medium temperature

Max. 85 °C

Pressure rating PN 50
Nominal diameter DN 25
Process connection G 1¼ male thread*
Sensor Hall effect sensor
Pulse output 65 pulses/litre
Electrical connection 4 pin plug connector M12 x 1

Power supply

6.5...24 VDC
short circuit proof and reverse polarity protected
Degree of protection IP54

* Supplementary screwed connection required



  • Screen filter: Flat filter, mesh size 0.63 mm


Further details and accessories can be found in the datasheet.


Data sheet

Operating manual

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