Cannon – Fenske viscometers for transparent and opaque liquids

These viscometers are provided for measurement of kinematic viscosity of transparent liquids (Cannon-Fenske direct flow viscometers, a sample volume is about 7ml) or opaque liquids (Cannon-Fenske backward flow viscometers, a sample volume is about 12ml). Size and constants of viscometers of direct and backward flows are matched together).