Visual

Description: visual test to evaluate the presence of free suspended water and contamination by solid particles in distilled fuels.

Advantages: Two test methods are used to determine the contamination of a sample. It is a rapid test to assess the presence or absence of water and particulate matter.

ASTM D7777

Description: to determine the density of a sample of fuel at 15ºC using a portable digital density meter.

Advantages: Results with high precision (to the nearest 1 kg/m³).

ASTM D445 / ISO 3104

Description: viscosity corresponds to a physical property that characterizes the resistance of a given fluid to flow, as well as shear deformation. This property varies with temperature. During the test, a Cannon-Fenske viscometer is charged with a sample and is put in a thermostatic oil bath at 40ºC. As the sample flows through the Cannon-Fenske viscometer, the time is measured to calculate the kinematic viscosity.

Advantages: a test determines the kinematic viscosity at a defined and stable temperature. The test uses international standards (ISO or ASTM) that allow the determination of values within a range of 5 to 700 mm²/s (cSt).

ASTM D7094

Description: during the test, a sample is subjected to progressive heating, being regularly exposed to a flame. The flash point will correspond to the lowest temperature at which the sample releases enough steam to form a flammable mixture.

Advantages: it allows to evaluate the applicability range (combustion) of the fuel and to evaluate its danger.