viscosity Index
  • ASTM D445 Square Bath Kinematic Viscosity Apparatus

    ASTM D445 Square Bath Kinematic Viscosity Apparatus

    KN-445QZ Automatic Kinematic Viscosity Tester conforms the ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity). It is used to test the of liquid petroleum products, both transparent and opaque, by measuring the time for a volume of liquid to flow under gravity through a calibrated glass capillary viscometer. The dynamic viscosity, η, can be obtained by multiplying the kinematic viscosity, ν, by the density, ρ, of the liquid. Under certain constant temperature. The range of kinematic viscosities covered by this apparatus method is from 0.2 to 300 000 mm2/s at all temperatures

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  • ASTM D2270 Calculating Viscosity Index From Kinematic Viscosity At 40 And 100°C

    ASTM D2270 Calculating Viscosity Index From Kinematic Viscosity At 40 And 100°C

    The viscosity index is a widely used and accepted measure of the variation in kinematic viscosity due to changes in the temperature of a petroleum product between 40 and 100°C. A higher viscosity index indicates a smaller decrease in kinematic viscosity with increasing temperature of the lubricant. The viscosity index is used in practice as a single number indicating temperature dependence of kinematic viscosity. Viscosity Index is sometimes used to characterize base oils for purposes of establishing engine testing requirements for engine oil performance categories

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