Falling ball viscometer

Function and Applications

For the precise measurement of the viscosity of transparent Newtonian liquids in combination with a circulation thermostat. The fall time of a ball with density r₁ in the test liquid with density r₂ is measured while it moves through an inclined cylindrical fall tube. From this fall time and a constant K taken from the apparatus table, the dynamic viscosity η is determined.

Benefits

• All-in-one solution: supplied ready for use including ball set, thermometer, calibration certificate and cleaning tools.
• Standards-compliant: conforms to DIN 53015 and ISO 12058.
• Wide measuring range: approx. 0.6 mPa·s to > 50,000 mPa·s using interchangeable balls.
• Precise temperature control: integrated temperature jacket, measurements possible from –20 … +150 °C.
• Closed measuring system: prevents evaporation, air ingress and skin formation.
• High reproducibility: defined measuring position (10°) and excellent repeatability and comparability.
• Easy operation: ball return by tilting, no disassembly required.
• Maintenance- and cleaning-friendly: cleaning tools included, replaceable fall tube and jacket tube.
• QM-suitable: factory-calibrated, calibration with traceable reference liquids possible.

Equipment and Technical Data

• Precision fall tube with distance markings, mounted in a pivoting glass cylinder on a stand base.
• Hose nozzles for connection to a thermostat bath.
• Measuring range: 0.6 … 75,000 mPa·s (cP).
• Temperature range: –20 … +150 °C.
• Accuracy: 0.1 °C.
• Fall tube diameter: 15.95 mm.
• Included in delivery:
  • 6 falling balls.
  • Thermometer –1 … +26 °C (graduation 0.1 °C).
  • Cleaning device.
  • Ball gauge.
  • Ball tweezers.
  • Case and test certificate.