粒度表徵分析儀
無論您的特定顆粒表徵需求是什麼，歡迎向我們諮詢實現它們的技術。我們的儀器使用的技術包括庫爾特原理，雷射衍射，光散射和偏振光強度散射（PIDS），以提供您特定應用所需的數據，包括Multisizer 4e粒度分析儀等。
*本產品僅供工業與科學研究使用，不用於臨床診斷
Multisizer 4e 庫爾特顆粒計數及粒度分析儀
- 總尺寸範圍為 0.2μm -1,600μm
- 10μm 孔徑用於微粒測量（0.2μm）
- 多個安全級別以遵從 CFR 21 第 11 部分要求
- 在較寬的粒徑分佈範圍內進行複雜的樣品分析
- 隨時都有質量保證（多個 SOM / SOP 配置和 V-check 驗證包）
FAQ on Particle Size Analyzers
What is a particle size analyzer?
A particle size analyzer is an instrument used to measure the size and distribution of particles in a sample. Depending on the measurement principle, the instrument may report a number-based or volume-based size distribution and may also provide particle counts or concentration data. The reported size represents an equivalent diameter defined by the measurement method, rather than necessarily describing every dimension of an irregular particle. Particle size analyzers are commonly used in pharmaceutical, biotechnology, chemical, food, cosmetics, and materials science laboratories to support product development, quality control, and process optimization.
What is laser diffraction particle size analysis?
Laser diffraction measures the angular pattern and intensity of light scattered by a population of particles. Larger particles concentrate scattering at smaller angles, while smaller particles contribute proportionally more scattering at wider angles. Software applies an optical model to the measured scattering pattern to calculate a volume-based particle size distribution. Method inputs, including the optical model and refractive-index information where applicable, can affect the reported result. The multiwavelength LS 13 320 XR Particle Size Analyzer combines laser diffraction with PIDS measurements to extend direct measurement into the submicron range.
How is particle size measured?
Particle size can be measured using different physical principles. Laser diffraction determines a particle size distribution from the pattern of light scattered by a population of particles. The Coulter Principle detects changes in electrical resistance as individual particles suspended in an electrolyte pass through an aperture, enabling particle counting and sizing. The appropriate method depends on the expected size range, sample form, required distribution basis, particle concentration, and analytical objective.
What is particle size distribution?
Particle size distribution describes the relative amount of particles present across a range of sizes. A distribution may be reported by number, volume, mass, or another basis, depending on the measurement technique and calculation method.
What is the difference between laser diffraction and the Coulter Principle?
Laser diffraction measures the collective light-scattering pattern from a population of particles and typically reports a volume-based particle size distribution. The Coulter Principle measures particles individually as they pass through an aperture in an electrolyte, providing number-based particle size and count data. Laser diffraction is often selected for broad particle size distributions and wet or dry powder methods, while the Coulter Principle is useful when individual particle counts, concentration, or number-based distributions are required. Final method selection depends on the sample, size range, dispersion conditions, and required output.
