In Great Britain, a scale used as a conventional measure of kinematic viscosity. Symbol, E or °E.
Unlike the Saybolt and Redwood scales, the Engler scale is based on comparing a flow of the substance being tested to the flow of another substance, namely water. Viscosity in Engler degrees is the ratio of the time of flow of 200 cubic centimeters of the oil whose viscosity is being measured to the time of flow of 200 cubic centimeters of water at the same temperature (usually 20°C but sometimes 50°C or 100°C) in a standardized Engler viscosity meter.
The Engler degree is named for Carl Oswald Viktor Engler (1842-1925).
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