The Density Meter measures density using a hydrometer dropped in warmed oil. Most oil can be measured at 50ºC but for very viscous oils the units can be set to warm to 70ºC. There is a calculator feature, which allows the reading to be adjusted to show Density at 15 ºC in a vacuum. If the viscosity is known in Censtistokes or Centipoise the calculator will display the CCAI.