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Whatman™ Glass Microfiber Prefilter, 1μm Particle Retention Rating

Multilayer graded density filters for rapid and efficient filtration of samples with high solids content. Whatman™ Glass Microfiber Prefilters are designed with a coarse glass filter top layer (10μm) meshed with a finer layer. The multigrade glass filter traps larger particles in its pores of the coarse layer, medium-sized particles in the interface meshing, and smaller particles in the interstices of the fine layer.

Manufacturer: whatman™  WHT1841-090

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Catalog No. 09-916-5

  • / Pack of 20 Each

Description & Specifications


Airflow Rate 3.1 s/100 ml/1.56 cm2
Diameter (English) Outside 3.5 in.
Flow Rate 3.1 sec./100mL/1.56cm2
Grade GMF 150
Particle Retention 1.2μm
Quantity 20/pack
Thickness (English) 0.028 in.
Thickness (Metric) 730μm
Diameter (Metric) Outside 90mm
For Use With (Application) Higher particulate loading capacity with faster flow rates
Material Borosilicate glass
Type Prefilter

  • Can filter nearly twice as much sample volume as that of a single-density prefilter
  • Compared to an unprotected membrane, three to seven times greater sample volume can be filtered
  • Higher particulate loading capacity and faster flow rates than uniform prefilters
  • Excellent particle retention (both large and small particles)
  • 100% borosilicate glass, binder-free
  • Extends life of final filter membrane