Kugle-fald-viskosimeter

Höppler-type falling sphere viscometer for simple but accurate measurement of dynamic viscosity of transparent Newtonian fluids. The sphere rolls and slides inside an inclined cylindrical tube filled with the fluid to be tested. The viscosity is measured in mPa s and is derived directly from the time the sphere takes to fall a specified distance through the fluid in the measuring tube. The tube can then be turned upside-down so that time the sphere takes to fall back can also be measured. The tube is situated inside a water bath, which can be filled with water at a specific temperature in order to measure how viscosity depends on temperature.

Includes:

• Falling sphere viscometer with 6 spheres and 1 ball gauge
• Thermometer 0 – 100° C
• Cleaning set
• Test certificate with accurate values for sphere constant K and density ρ for converting duration of fall to actual viscosity.
  

• Measuring range 0.5 mPa s to 7x10⁴ mPa s (as per DIN 53015)
• >7x10⁴ mPa s (for sphere fall times > 300 s)
• Measurement precision 0.5 to 2% (depending on spheres used)
• Spheres:
  • #1, #2: Borosilicate glass
  • #3, #4: Ni-iron
  • #5, #6: Steel
• Diameter of spheres: '4,11,00 to 15.81 mm
• Diameter of measuring tube 15.95 mm
• Fall times for spheres 30 to 450 s
• Length of measured distance: 100 mm in both directions
• Operating angle: 10° to vertical
• Additional working angles 70°, 60°, 50° to horizontal
• Volume when full: 40 ml
• Permissible temperature range: -60°C to +150°C
• Dimensions: 180x220x330 mm
• Weight: 3.1 kg