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SIKA

VTH 20 Turbine Flow Sensor

The SIKA VTH 20 turbine flow sensor is made for flow measurement or dosing applications for liquids. Because of the very compact design, the extensive measuring range and the convincing precision of measurements, almost unlimited applications are possible. The sturdy bearing materials - sapphire and tungsten carbide - also guarantee an exceptionally long endurance.

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Material pipe section Brass
Measurement range 1...42 l/min - with continuous operation max. 25 l/min
Accuracy ±1 % of range, ±3 % of reading (from 15 l/min)
Repeatability ±0.2 l/min
Signal output From 0.25 l/min
Medium temperature 0...85°C
Pressure rating PN 16
Nominal diameter DN 20
Process connection G 1 male thread
Sensor Hall effect sensor
Pulse rate / K-factor 232 pulses/l
Electrical connection 2 m PVC cable, shielded (Tmax = 75 °C)
Power supply 10...30 VDC, optional 4.5...26.5 VDC
Degree of protection EN 60529 IP54
Max. particle size in the medium < 0.63 mm

The SIKA VTH 20 turbine flow sensor is made for flow measurement or dosing applications for liquids. Because of the very compact design, the extensive measuring range and the convincing precision of measurements, almost unlimited applications are possible. The sturdy bearing materials – sapphire and tungsten carbide – also guarantee an exceptionally long endurance.

The liquid flowing into the SIKA VTH 20 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.

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