We will introduce a discussion on the settling distance and time based on particle size!
This document presents considerations on particle sedimentation. It includes calculations of sedimentation distance per unit time for particles, as well as other related values. We have provided clear graphs and tables, so please take a look. However, this is only an example concerning solid particles. Droplets are excluded due to their significant interaction with the environment. [Contents] ■ Calculated values of sedimentation distance per unit time for particles - Sedimentation time in the vertical direction can be calculated by particle size (or conversely, floating time) - Gravitational sedimentation velocity of fine particles *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us. Particles settle due to gravity. When the particle size becomes small, the diffusion coefficient becomes significant. Smaller particle sizes result in longer suspension times. Generally, particle counters measure suspended particles, so constant-speed suction becomes an important factor. Roughly speaking, particles larger than 5 micrometers do not fit this concept. Please be aware of the behavior of particles based on their size. - Particles around 1 micrometer in biological exhalation secretions, which have a density close to 1, are difficult to diffuse and tend to remain suspended. Dead space and continuous supply sources lead to the concentration of particle density. However, it is not straightforward to determine what form droplets like secretions will ultimately take and how their transit state will be, but if they eventually become pseudo-solids, this concept applies. - Conversely, larger particles tend to fall quickly in clean rooms (not exclusively, but generally), making them difficult to sample with particle counters and easy to overlook. - By understanding the characteristics of particles, the data from particle counters can provide more effective information.
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For more details, please refer to the PDF document or feel free to contact us. There are particles that cannot be captured by particle counters in clean room monitoring.
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<It's just a particle counter, but it's still a particle counter> Particle Plus Inc. designs and manufactures particle counters and air quality monitoring instruments equipped with advanced sensors and a wealth of features. We provide technology, expertise, and services to production environments and living spaces that require clean environments, such as life sciences, food and beverage, pharmaceuticals, indoor air quality, atmospheric environment, industrial hygiene, cosmetics, semiconductors, aerospace, and data storage industries. Our company helps you stay ahead of the times by offering unique particle sensors, counters, and insights based on cutting-edge technology.