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.

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.