Process Viscosimeter QVis 01/o in compact special design

Compact & economical viscosimeter for standard installation

What would the world be without colours? The quality of colour is equally important for printing, and the production and application of paints, varnishes, coatings, etc. However, color is not just color and in each case the viscosity of the materials involved plays a central role for a perfect result.

Quartz Viscosimeter QVis for the continuous monitoring of paints, lacquers & coatings.

Relevance of viscosity

Depending on the field of application, paints, lacquers and coatings show a wide variety of compositions. Nevertheless, for all of them their consistency, i.e. their fluidity or viscosity, is of decisive importance. If the product used is too thick (too high viscos) or too thin (too low viscos) for the respective machine, the liquid cannot be handled optimally in either case.

Also, the ideal mixing ratio must be monitored continuously in order to counteract evaporation effects in the process and to keep the viscosity constant. The QVis quartz viscosimeter has been expertly designed to deal with these challenges in a masterful way.  

Monitoring the viscosity of paints, varnishes and coatings

At the heart of the quartz viscometer QVis developed by flucon fluid control GmbH there is a quartz crystal which is subjected to high-frequency vibrations. The viscosity is then determined from the specific influencing of the oscillation behavior by the surrounding measuring liquid. This innovative process, which is already being widely used in the paint, varnish and coating industry, allows the continuous measurement of dynamic viscosity and temperature in the process.

Maximum installation flexibility

Since the viscosity measurement is independent of the direction of flow and since the QVis can be used for a large measuring range without requiring a change of the measuring head, the sensor can be installed at any location, e.g. directly into the pipe or into the tank.

Bild des kompakten Prozessviskosimeters QVis.

The quartz crystal as the heart of the QVis sensor is extremely robust and enables the continuous measurement of the viscosity even under harsh process conditions, with the great advantage that no moving wear parts are required.

Compact and cost-effective viscometer: optimized for installation in plants

Key features at a glance

  • Compact and economical viscometer for standard installation
  • Robust quartz sensor without moving parts
  • Analog interface (4 ... 20mA or 0 ... 10V) for the measured value output
  • Measurement of dynamic viscosity and temperature in the process
  • Optional output of kinematic viscosity
  • Viscosity measurement independent of flow
  • Large measuring range (1 to 10.000 mPas) without a change of the measuring head
  • Easy to handle and to clean
  • Standard interface (RS 232) for optional connection to a control computer
  • Optional connection to an operator terminal with LCD

Technical specifications

Voltage supply110-240 VAC or 9-36 VDC
Viscosity range1 to 10.000 mPas
Accuracy+/- 2% deviation for reference calibration
Measuring timeapprox. 15 s
Measuring frequencyApprox. 56 kHz
Temperature range sensor-20°C to 120°C (optionally up to 300°C)
Pressure range sensormax. 25 bar
Temperature measurementPT100 (4-wire technology), +/- 0,1°C
Dimensions electronic box (LxWxH)200x112x70 mm
Dimensions sensorL=50mm immersion depth, also available in version with G1"thread

The patented and well-proven measuring principle makes the QVis system unique and opens up new possibilities in the area of viscosity determination and regulation. The high shear gradient allows measurements in the high-shear range, without undesirable temperature regression or any other influence on the test substance.

The QVis generates analog output values (4 ... 20mA or 0-10V) for further processing. If desired, the PC program included in the scope of delivery can be used to connect the QVis to a laptop or control computer in order to record the measured values.