The WLP-202 Fisher Sub-Sieve Sizer/Average Particle Size Analyzer (FSSS) utilizes the air permeability method to accurately and efficiently determine the average particle size, also known as the Fisher number particle size of powders. It fully complies with international standards including ISO 10070 and ASTM B330-20. Serving as a reliable substitute for the discontinued Fisher Model 95 Sub-Sieve Sizer, Huayu’s instruments offer exceptional performance and durability. Representing world-class engineering, our WLP series is the top choice among Fisher Sub-Sieve Sizers on the market.

Designed for ease of use and reliability, the WLP-202 is our original Fisher Sub-Sieve Sizer model, which offers the lowest cost per testing. Results are displayed directly on a self-calculating multi-curve chart, with no limitations on particle shape. Ideal for all powder-processing industries, it provides precise powder size determination for a wide range of applications. 

Building on the foundation of our WLP-202 model, we have since introduced the WLP-205, WLP-208, and WLP-216 models, each designed to meet specific industry needs and offer an enhanced user experience.

Huayu’s WLP series of Fisher Sub-Sieve Sizers (FSSS),is the trusted choice for industries demanding exceptional accuracy in measuring fine powders and sub-sieve materials. Specifically designed for particles below 75 microns, WLP series delivers robust results that empower your research and quality control processes and is an indispensable tool across industries such as metallurgy, pharmaceuticals, ceramics, material science, and food processing.