In viscosity testing, the outflow method is the main viscosity testing method at present, and the ISO organization has specified the standard of ISO outFlow Cup - ISO2431-93E for the standardization of measured flow stability and measurement data, which designs ISO outFlow Cups of different diameters for different test ranges. The outflow aperture of the Dutch TQC ISO8 outFlow Cup is 8mm, and the viscosity range of the test is 600~200cst, which are two ISO outFlow Cups with a relatively large viscosity range, and the models are VF2093 and VF2051 respectively.
1. The ISO8 outFlow Cup of VF2093 model is a portable ISO outFlow Cup, equipped with a long handle, which is directly immersed in the Viscosity Cup into the tested sample by the hand-held handle, filled and then lifted to calculate the outflow time to determine the viscosity of the liquid, which can be tested anytime and anywhere, so it is more used for construction or production site testing, but there are some interference factors of artificial force, such as hand shaking, etc.
2. VF2051 ISO8 outFlow Cup is a desktop ISO outFlow Cup, which is often equipped with a bracket to cooperate with the test, and is more used in the laboratory for viscosity testing.
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| Model | VF2093 | VF2051 |
| Material | Aluminum alloy | Anodized aluminum |
| type | portable | Desktop |
| Filter diameter | 8mm | 8mm |
| Measuring range | 600~2000cst | 600~2000cst |
| Outflow time | 30~100s | - |



