Positive displacement-spur gear flow sensors

Gearwheel type flow sensors from SIKA record volume flows of liquids with both high and changing viscosities. The high-precision sensors work according to the displacement principle. The high resolution combined with reliable measurement accuracy make the sensors especially useful for applications involving the measurement of small and very small volumes. In principle, the measurement accuracy is increased for high viscosities. Conversely, the measurement accuracy is lower with a viscosity of less than 10 mm²/s. Due to their construction, gearwheel type flow sensors require a certain lubricity of the fluid being measured. Operation with non-lubricating media, e.g. water, is not possible.

Positive displacement flow sensors VZGG / VZVA
Series VZGG / VZVA Positive displacement flow sensors are available with a variety of casing and sealing materials, meaning they can be universally used for different measurement media.

Positive displacement flow sensors VZAL
Series VZAL positive displacement flow sensors are manufactured with aluminium housing and are available with standard process connections.

Positive displacement flow sensors accessories
The SIKA TD 8250 local display is simply fitted between the connector plug and the cable socket of the SIKA VZ... positive displacement flow sensor. It is programmable via two buttons which are located behind the front panel. It can be set to display either the actual flow rate or the total volume (counter function), as required.

The TD 8250 is available in three different output signal versions:

  • Pulse output (2-channel, depending on flow sensor)
  • Analog output 0(4)...20 mA
  • Two alarm contacts