Quartz Microfibre Filters

Recommended filters for atmospheric pollution control and for particles determination at high temperatures.


Filters are made of pure quartz microfibre (SiO2), free of binding elements or additives.

  • Extremely low content in alkali-earth metals.
  • Excellent retention of very fine particles through the adsorption mechanisms of quartz fibres
  • Air permeability: extremely high. Able to pass through large volumes of air.
  • Chemical stability: excellent stability with hardly any loss of filter-material due to chemical reactions under extreme conditions with acid gases (HCl,SO2, SO3, H2SO4, NO and NO3); except HF.
  • Excellent resistance to solvents.
  • Stability at high temperatures: higher resistance than glass microfiber, up to 1000 ºC.

Ordering information:

These types are available as filter circles with the following sizes (in mm): 37 – 47 - 70 – 150. The package size is 50 per box.

Other sizes, sheets, rolls and special cuts are available on request.

Grade Weight [g/m²] Thickness [mm] TSI efficacy % [particles 0,3 μm] Max T [°C] Binder
QFH 85 0,45 99,999 1000 no