Measuring of particles share in liquids

There are different tests for identification of “visible” (over 50 mcm) and “invisible” (less than 10 mcm) particles. Presently the only officially acknowledged method of invisible parts identification is application of optical particle counters. Particle counters are equipped with a volumetric sampler, which ensures the necessary speed of liquid passing through the sensor and controls the starting and ending moment of particle counting within given range. Syringe samplers are the most accurate for this process.