Information about Gas Filters

Protection levels

Protection level

Colour

Hazard types

Examples

Maximum use level

A1


Organic gases and vapours,
boiling point > 65°C

Working with solvents created by
varnish, paints and adhesives

10 x WEL [half mask]
20 x WEL [full face mask]
or 1000 ppm whichever is lower

A2


As A1

As A1 but to higher concentrations

10 x WEL [half mask]
20 x WEL [full face mask]
or 5000 ppm whichever is lower

A1B1E1


As A1+ inorganic gases and vapours + acid gases

As A1 + working with chlorine, bromine, hydrogen cyanide, sulfur dioxide, hydrochloric acid and other acid gases

10 x WEL [half mask]
20 x WEL [full face mask]
or 1000 ppm whichever is lower

A1B1E1K1

As A1B1E1 + ammonia

As A1B1E1 + working with ammonia

10 x WEL [half mask]
20 x WEL [full face mask]
or 1000 ppm whichever is lower

A2B2E1

As A1B1E1

As A1B1E1 but to higher concentrations

10 x WEL [half mask]
20 x WEL [full face mask]
or 5000 ppm (A + B),
1000 ppm (E) whichever is lower

A2B2E2K2

As A1B1E1 + ammonia

As A1B1E1 + working with ammonia but to higher concentrations

10 x WEL [half mask]
20 x WEL [full face mask]
or 5000 ppm whichever is lower

AX

Organic vapours boiling point ≤ 65°C

Working with low-boiling vapours e.g. acetone, dichloromethane

For single use only
National legislation may limit maximum usage levels
Please contact Moldex for details

Hg P3

Mercury

Working with mercury vapours

Maximum use time against mercury 50h