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Whatman™ Glass Microfiber Prefilter, 2μm 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™  1842-090

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Catalog No. 09-874-86


Description & Specifications


Quantity 40/pack
Type Prefilter
Airflow Rate 1.5 s/100 ml/1.56 cm2
Material Borosilicate glass
Diameter (Metric) Outside 90mm
For Use With (Application) Ideal as prefilters, nearly double filtration volume compared to single-density prefilters
Flow Rate 1.5 sec./100mL/1.56cm2
Format Circle
Grade GMF 150
Particle Retention 2μm
Temperature (Metric) Max 500°C
Thickness (English) 0.029 in.
Thickness (Metric) 750μm
Diameter (English) Outside 3.5 in.
Temperature (English) Maximum 932°F

  • 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