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.

Brand: Whatman™

Manufacturer Part Number: 1841-047

UNSPSC: 41104900

Code: 69

Additional Details:
Additional Details: Weight: 2.38140kg

Product Code. 11305144

Quantity Price
1 £ 40.9 / Pack of 40
10 £ 32.72 / Pack of 40
Estimated Shipment
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Description and Specification


Airflow Rate 3.1 s/100 ml/1.56 cm2
Flow Rate 1.5 sec./100mL/1.56cm2
Format Circle
Grade GMF 150
Particle Retention 1μm
Quantity 40/pack
Temperature (Metric) Max 500°C
Thickness (Metric) 750μm
Diameter (Metric) Outside 47mm
For Use With (Application) Ideal as prefilters, nearly double filtration volume compared to single-density prefilters
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