MIRA Safety NBC-77 SOF Filter

Item Code: NBC77SOF
Out of Stock
Email me when in stock
See More
  • 20 Year Shelf Life
  • 40mm x 1/7" NATO Threading
  • Filters All Known CBRN Agents
  • You May Also Like

    Reviews / Q&A

    The MIRA Safety NBC-77 SOF Gas Mask Filter in combination with a full-face respirator, mouthpiece assembly, or PAPR, reliably protects air passages from a wide range of harmful and highly toxic substances, including all known chemical, biological, radiological, and nuclear (CBRN) agents

    These gas mask filters are produced with standard round threads according to STANAG 4155 (EN 148-1) - Rd 40 x 1/7". The filter components are made of hard plastic. This results in a very robust product that is extremely durable against shock and impact damage in operational use.


    • Compatible with standard 40mm NATO threaded respirators, which are widely available.
    • 20-year shelf life - save money long-term by not having to replace your filters every 5 years
    • Used by military personnel, CBRN specialists, and special operations forces all over the world
    • Filter all known CBRN agents, including radioactive iodine, rated for A2B2E2K2HgSXP3 D R.
    • Certified by European agencies and has the "CE" symbol. Compliant under EN 14387:2004 + A1:2008
    Technical DataBreathing Resistance In Pa
    Diameter 110 mm @ Flow Rate 301/Min. EN 1) NBC-77 SOF
    260 <140
    @ Flow Rate 951/Min. EN 1) NBC-77 SOF
    980 <600
    Height 85 mm
    Weight 335 g ±5%
    Storage Time 20 years (factory sealed)

    Type & Class Particle Filter Efficiency @ Flow Rate 95 L/MParticle Efficiency @ Flow Rate 95L/M
    A2 - organic gases and vapors SX - CG, CK, PS Sodium Chloride NaCl (S)
    Paraffin oil (L)
    EN 99.95
    NBC-77 SOF > 99.999
    B2 - inorganic gases and vapors P3 - particles
    E2 - acid gases and vapors D - dust
    K2 - ammonia and amines R - reusable
    Hg - mercury vapors REACTOR - radioactive iodine


    The filter canister in connection with a suitable respirator or PAPR provides protection against solid and liquid particles, pepper spray (OC), smoke-producing substances, radioactive particles, bacteria and rickettsia, fungi, toxins, viruses, riot control agents (lachrymators, sternutators, vomiting agents), blister agents (vesicants), choking agents, blood agents, nerve agents, incapacitants, herbicides, pesticides, and TIC, such as bromoacetone, CS, CR, CN, CNC, CNS, CA substances, organic compounds of arsenic - diphenyldichlorarsine - CLARK I (DA), diphenylcyanoarsine - CLARK II (DC), adamsite (DM), diphenyldichlorarsine (DA), ethyldichlorarsine (ED), methyldichlorarsine (MD), mustard gas (H), sulphur mustard gas (HD), T-mustard gas, Q-mustard gas, nitrogen mustard gases (HN1, HN2, HN3), lewisite (L), mixed mustard gas (H-L), phosgene oxime (CX), phosgene (CG), diphosgene(DP), chloropicrin (PS), hydrogen cyanide (AC), cyanogen chloride (CK), arsine (SA), G-agents: sarin (GB), cyclosarin (GF), soman (GD), tabun (GA), IVA (GV), V-agents: VX, VR, VE, VG (amiton), VM and toxic industrial chemicals such as: fumes of organic or inorganic acids, hydroxides, organic solvents with a boiling point above 65° C, ammonia, amines, inorganic and acid gases, agricultural chemical combustion gases, other toxic substances, e.g. benzene, toluene, vinyl chloride, fluorine, hydrogen fluoride, sulphur oxides, chloroacetic acid, aldehydes, mixtures of inorganic acids, and organic substances, mercury vapors, radioactive iodine, organic compounds of iodine (Iodomethane, 129, 131), radioactive particles, etc.

    Testing Gas  Concentration Of Gas (PPM)Concentration Of Gas (MG/1)Breakthrough Time In Minutes ENNBC-77 SOFDAC In Grams NBC-77SOF
    A2 Cyclohexane C₆H₁₂ 5000 17.5 35 39 20.475
    B2 Chlorine Cl₂ 5000 15 20 45 20.250
      Hydrogen Sulphide H₂S 5000 7.1 40 >80 >17.400
      Hydrogen Cyanide HCN 5000 5.6 25 50 8.400
    E2 Sulphur Dioxide SO₂ 5000 13.3 20 25 9.975
    K2 Ammonia NH₃ 5000 3.5 40 50 5.250
    Hg Mercury Hg ----- 13 mg/m³ 100 hours >170 hours >3.900
    SX Cyanogen chloride CICN 2500 6.28 20 25 4.710
      Chloropicrin CCI₃NO₃ 5000 33.55 20 44 44.286
      Phosgene COCl₃ 5000 20.24 20 >77 >47.058
    REACTOR Methyloidide₁₃₁ CH₃I - - 2 Hours >2 Hours -


    Breakthrough time of a filter is tested according to EN 14387+A1 at humidity 70% and flow rate 30 l/min, which is equivalent to the volume of air per minute used by an average person carrying out medium heavy work. The approximate lifetime (usage time) of a filter may, under normal conditions, calculated by comparing the concentration at the workplace and the minimum Dynamic Adsorption Capacity (DAC) for the filter.

    Storage & Maintenance:

    The filters are sealed in plastic bags by the manufacturer. Store the filters unopened in a clean place at even temperature, most appropriate at -5 to +30°C and relative humidity below 80%. Sealed filters tolerate also conditions of -30 to +50°C and RH below 95%. The storage period (month and year) for filters is marked on the filter label. Do not try to regenerate the filters. Never clean the filters with compressed air or compressed water.


    After use, the filters are special refuse. Make sure that they are disposed of according to the filtered substance (gases or particles) in accordance with current waste treatment regulations. If the product is to be disposed of, it should be dismantled from the respirator and disposed of as solid waste. Please see local authority regulations for disposal advice and locations.

    WARNING: This product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.

    Reviews / Q&A

    Customers who bought this also bought

    Best Sellers