Micro Ubbelohde viscosimeter

Besides these viscosimeters, several other special-purpose designs have been developed (Micro Ubbelohde viscosimeter DIN 51562 Cannon-Ubbelohde semi micro viscosimeter ISO 3105 BS/IP/U-tube viscosimeter DIN 51372 BS/IP/SL viscosimeter ISO 3105 Vogel-Ossag DIN 51561). Those are tailored to specific needs and are not further discussed at this point. 

Even under normal ambient pressure relatively high shear rates occur at the wall of capillary viscosimeters (especially for small capillary diameters and low viscosity liquids), that can lead to a falsification of the results for so-called non-Newtonian liquids (see later in this monograph). In Tables 3.1 and 3.2 the maximum occurring shear rates for the admissible minimal running times tniin of the capillary are given for the standard Ubbelohde capillary viscosimeter (ISO 3105) and the Micro Ubbelohde capillary viscosimeter (DIN 51562). 

Table 3.2. Parameters for Micro-Ubbelohde Capillary Viscosimeters (DIN 51562) with Ref. numbers 536.., 537.., 538.., capillary number (No.), capillary diameter (D), capillary constant (K)> minimum measurable flow time (tmin), maximum shear rate at minimum flow time (fmax) kinematic viscosity range (v)...

---

See also in sourсe #XX -- [ ]

---