![]() ![]() ![]() Another version is the Ubbelohde viscometer, which consists of a U-shaped glass tube held vertically in a controlled temperature bath. These devices are also known as glass capillary viscometers or Ostwald viscometers, named after Wilhelm Ostwald. Ostwald viscometers measure the viscosity of a fluid with a known density. ![]() Standard laboratory viscometers for liquids ![]() These values are used for calibrating certain types of viscometers.
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