This device complies with DL / T 432-2007, used to measure the resistance oil, turbine oil, transformer oil and other oil and other oil auxiliary particle pollution. Especially for oil-like viscosity of emulsion is serious or too much oil. Determination of the oil sample is filtered through a vacuum, so the oil-like particles evenly distributed in the porous membrane, in the oil pollution under transmitted light comparison microscope, and the grade of oil pollution standard template by comparing the oil sample particle pollution levels. Can be widely used in electric power, petroleum, chemical, commodity inspection and R & D departments