Cold Filter plugging point of diesel, biodiesel and heating fuels. The sample is cooled down according to the methods and when the preselected temperature is reached a vacuum of 20 mBar is automatically applied to the sample. The product is sucked through the filter into the calibrated aspiration pipette. If the sample takes more than 60 seconds to reach the upper barrier detector (during the aspiration phase), or it fails to return completely into the test jar before the product has cooled by a further 1°C, the Cold Filter Plugging Point is reached. CFPP measured by Aspiration pipette, Filter assembly, Light barrier.