The particle size distribution of soluble coffee directly influences the quality of the final beverage. If too coarse, incomplete dissolution can occur, leading to sedimentation and uneven flavor extraction.
Conversely, if too fine, excessive dust can result, affecting texture and creating an overly rapid dissolution.
Particle size requirements vary depending on the intended application:

• Instant Espresso : Requires fine granules (approximately 100-300 µm) for rapid dissolution under pressure.
• Instant Filter Coffee : Requires medium granules (approximately 300-800 µm) for even dispersion and balanced extraction.
• Bulk Instant Coffee : Requires coarser granules (approximately 800-2000 µm) to prevent excessive dust and ensure gradual dissolution.

Traditional methods such as sieve analysis and laser diffraction present significant limitations:

• Sieve Analysis: While commonly used, this method is labor-intensive and prone to errors due to particle agglomeration, potentially skewing results.
• Laser Diffraction: Provides a rapid particle size distribution measurement but lacks detailed information on particle shape, which is essential for understanding dissolution behavior.

The Zephyr ESR C is a state-of-the-art particle analyzer designed for precise characterization of soluble coffee.
This technology utilizes a vibration dispersion system combined with a conveyor belt mechanism, allowing efficient handling of dry samples, including fine powders and cohesive granules.
This instrument represents a major advancement in soluble coffee particle analysis.
It provides a comprehensive and precise solution for measuring particle size distribution, shape, and other critical properties.
This innovative technology enables coffee producers and quality control laboratories to maintain consistent quality and meet high consumer expectations.

Zephyr ESR