Applied Physics, Inc. 720-635-3931
PO Box 186 Monte Vista CO 81144
400 N Country Road 2E Monte Vista CO 81144
PSL Sphere Particle generator, ULPA filter, HEPA filter, clean room, filter test


Applied Physics, Inc.

Clean Room Fogger, CRF4

Ultrapure LN2 Fogger, AP35

Calibration Wafer Standard

PSL Wafer Standard

Contamination Wafer Standard

Particle Wafer Standard

Cleanroom Fogger, CRF2

LN2 Nitrogen Fogger

PSL Spheres, Polystyrene Latex Beads

Silica Nanoparticles in DIH2O, 15ml or 100ml volume

Smoke Study to Visualize Airflow and Turbulence

Call Applied Physics, Inc.

1-720-635-3931 or 303-999-6837


Particle Generator Using Polystyrene Latex spheres

A PSL Sphere Particle Generator provides a particle challenge to ULPA filters and HEPA filters. Polystyrene Latex spheres are used as a particle challenge to create an upstream particle challenge to measure filter particle efficiency across the downstream side of the ULPA and HEPA filters. Pin hole leaks can also be detected on the downstream using the proper scanning equipment across the filter surface. HEPA filters provide 4/9 and 5/9 filter efficiency, while ULPA filters offer 6/9 and 7/9 filter efficiency. The Model 2045 Particle Generator easily meets the upstream particle challenge, producing 7.2x10 E10 at 0.10μm particles per minute. Polystyrene Latex spheres at 0.3μm are used to challenge HEPA filters and detect pin hole leaks, while Polystyrene Latex spheres at 0.15μm or 0.12μm are used to challenge ULPA filters and detect pin hole leaks.

Polystyrene Latex, Particle Size Standards, 20 nm to 900 nm, 15ml volume, 1% concentration, NIST Traceable, Size Certified - Buy Now
Polystyrene Latex, Particle Size Standards, 1 micron to 160 micron, 15ml volume, < 1 % Concentration, NIST Traceable, Size Certified - Buy Now
Polystyrene Latex, Particle Size Standards, 47 nm to 3 micron, 50ml volume, 1x10e10 concentration per ml, NIST Traceable, Size Certified - Buy Now
Silica Nano-Particle Size Standards, 40 nm to 2000 nm, 15ml volume or 100ml volume, 10 % concetration, NIST Traceable, Size Certified - Buy Now

The upstream particle count of the filter challenge generally mixed with a filtered, air source. A 6/9 ULPA filter has the capability to trap 99.9999% of all particles flowing through the filter, which is 1/1,000,000. So a very high particle count is needed in the range of 1E10 particles per minute at 0.1 micron to 0.2 micron. HEPA filters require less particle challenge to sustain the upstream particle challenge. A PSL Sphere Particle Generator uses Polystyrene Latex spheres, mixed with the appropriate amount of airflow, generally from 700cfm to 2000cfm. A uniform airflow is needed to be supplied to the upstream side of the filter.

PSL Sphere Particle Generator

  • Polystyrene Latex Sphere, Particle Generator
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