Experts in gas detection and respiratory protection
Generic selectors
Exact matches only
Search in title
Search in content
Search in posts
Search in pages

Gas mask filter

Filtering air purifying respirators are efficient only if equipped with the proper gas, vapor or particles filter. The gas mask filter selection depends on the type of encountered gases, vapors and particles. According to the applications and the present gas, there are different gas filter types to ensure an adapted and efficient respiratory protection…

Gas mask filter and respirator cartridge for air purifying respiratory protection

Gas mask filter codification

Gas filters

Depending on the nature of gases or vapors, there are different gas mask filter types. Each respirator cartridge is labeled with a letter and a specific color for every gas or gas family in compliance with the EN 14687 European standard.

Gas mask filter respirator cartridge color codes:

filtre type A AX


Organic gas and vapor with boiling point above 65°C (solvents, hydrocarbons, alcohols, benzene, ethanol, refrigerants/freons, white spirit)

filtre type A


Organic compound gas and vapor with boiling point below 65°C (many VOCs, methyl acetate, acetone, chloroform, methanol, phenol, styrene)

Filtre type B


Inorganic gas and vapor (hydrocyanic acid, bromine, chlorine, cyanide, chlorine dioxide, fluorine, hydrogen sulfide, carbon disulfide)

Filtre type CO


Carbon monoxide

Filtre type E


Acid gas and vapor – mainly associated with P3 – (acrylic acid, formic acid, nitric acid, hydrogen chloride, sulfur dioxide, hydrogen fluoride)

Filtre type Hg


Mercury vapor and derivatives – mainly associated with P3

Filtre type K


Ammonia and organic derivatives (DMA, DMEA, hydrazine, methylamine, MMH, UMDS)

Filtre type Nox


Nitric oxide, nitrogen oxide, nitrous vapor

Filtre type REACTOR


Radioactive iodine, radioactive methyl iodine

Filtre type SX


Specific manufacturer mentioned gas and vapor

Filtre type P


Solid and liquid particles (lead, asbestos, ceramic fibers, aerosols), highly toxic and radioactive particles, bacteria and viruses (bird flu, A/H1N1 flue, SRAS, tuberculosis, Ebola virus)

Find the proper gas mask filter for your application

Gas filter categories:

According to the EN143 and EN143/A1 standards, respiratory protective filters are gathered into efficiency categories.

Maximum toxic substances concentrations allowed:

– Half mask respirator: 50 times the OEL

– Full-face mask respirator: 2000 times the OEL

. Class 1 (lower efficiency): Canister filter (ex: A1) – small capacity, gas rate below 0,1% volume

. Class 2: Cartridge filter (ex: ABEK2) – intermediate capacity, gas rate below 0.5% volume

. Class 3: For a gas rate below 1% volume

Particles filter

There are different particles filter classes:

– P1 class filters – low efficiency, stop at least 80% of this aerosol (penetration below 20%)

– P2 class filters – intermediate efficiency, stop at least 94% of this aerosol (penetration below 6%)

– P3 class filters – high efficiency, stop at least 99,95% of this aerosol (penetration below 0,05%)

Combined filters (gas and particles)

As their name implies, combined  gas mask filters stop both gases and particles. These filters are heavier than aerosol or gas cartridges but are more efficient. Air enters first a particle filter (which is also a pre-filter) and then goes through a gas filter.

Combined gas and particles filters provide safety against paint droplets and gases as well. These respiratory protective cartridges are mainly used for liquid spraying works.

Filtering air purifying respirator usage limits

Never use filtering respiratory personal protective equipment in the following situations:

– Ambient oxygen rate below 19%

– In confined spaces or any poorly ventilated areas: tanks, tunnels, boat slips…

– When the substance concentration is unknown or immediately dangerous to life or health (IDLH)

– When the substance concentration exceeds the allowable concentration or the filter capacity

Our respiratory protection filters :

Respiratory protection filters – PRO2000

PRO2000 NO & CO combined filter for full-face mask is the world most efficient air purifying protection against gases and particles.

  • respiratory protection filters for workers safety
  • High performance filter: ABEK1NOCO20-P3 & A2B2E2K1HgNOCO20-P3
  • Efficient against any gas or vapor that can be filtered
  • Universal DIN40 mm thread in compliance with EN148-1 standard
  • Reinforces polyamide enclosure
  • Complies with EN 14287:2004 standards
Request a quote

High-performance respiratory protection filters

The use of PRO2000 NO & CO respiratory protection filters is currently the worlds most complete filtration.

  • Respiratory protection filters PRO2000
  • High-performance filter: A1B1E1K1NOCO20-P3 & A2B2E2K1HgNOCO20-P3.
  • Efficient against almost every gases and vapors that can be filtered.
  • DIN40 mm universal connection.
  • Cas ematerial : reinforced polyamide
  • Compliant with EN 14287:2004 and EN 148-1 standards
Request a quote
Contact us