30μm large particle counter

Large particles are troublesome, and I want to detect them! However, they are difficult to find! This is where particle counters and know-how come in handy.

The Particle Plus large particle-compatible particle counter detects particles ranging from 0.5 µm to over 30.0 µm. The particle counter measures airborne particles "easily," "in real-time," "by anyone," and "on-site." However, only particles with small diameters can be considered airborne, as they are affected by Brownian motion from air molecules and experience air resistance, allowing them to remain suspended for long periods. In contrast, larger particles do not continue to float and settle (fall) quickly, and they have a low occurrence frequency that does not align with the particle size distribution pattern of atmospheric dust. It is understandable that there are concerns about the phenomenon of contamination by large particles in clean rooms, as well as the issue of having small particles being acceptable while large particles are not. For a particle counter, particles that are difficult to suspend and those that fall outside the premise of isokinetic sampling are very challenging to measure. As particles increase in size, the factors contributing to gravitational settling significantly increase compared to suspension. The particle counter cannot draw in falling particles by bending their trajectory. Opening the sampling inlet and waiting for falling particles to enter is purely a matter of chance. It is essential to measure this accurately. We are always available to assist, not just for demonstrations of the measuring instrument.

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