The rolling-ball microviscometer is based on the Hoeppler principle like the classic falling-ball viscometer. Instead of the original wide falling tube this instrument uses micro capillaries so that only extremely low sample volume is required. In addition, special capillaries are available for substances that corrode glass. Optional gold-coated balls enhance the system's resistance to aggressive chemicals further. The time is taken by inductive sensors. Thermoelectric temperature control and adjustable inclination angles extend the potential measuring range. Automated measurement is a further possibility.
Learn more about the Falling Ball Principle.
The measuring range of the rolling-ball microviscometer depends on the capillary/ball combination used.
Sample throughput - max./hour:
This viscometer has built-in thermoelectric heating and cooling (Peltier elements).
USP <913>, corresponds to DIN 53015 and ISO 12058
| Viscometer type | Rolling-Ball Microviscometer |
|---|---|
| Measuring principle | Rolling-Ball |
| Automatic | |
| Microviscometer | |
| Measured quantity | time |
| Calculated quantity | dynamic/kinematic viscosity (density required) |
| Viscosity range - min | 0.3 mPa.s |
| Viscosity range - max | 10,000 mPa.s |
| Temperature - min | -30°C |
| Temperature - max | +100°C |
| Liquid bath thermostat required | no (counter cooling for temperatures < 5 °C) |
| Temperature change with same filling | yes |
| Automation possible | yes |
| Sample volume - typical | starting from 0.1 mL / typ. 1.5 mL |
| Solvent volume - typical | manual: 5 mL / flow-through: 10 mL |
| Sample throughput - max / h | manual: 10 / flow-through: 20 |
| Measuring accuracy | < 1 % |
| Shear rate control | no |
| Shear rate calculation | yes |
| Lab space | < 0.25 m² |
| Standards and norms | USP <913>, corresponds to DIN 53015 and ISO 12058 |
We offer typical values which are based on the values in brochures and standards but are not related to specific instruments.
