Once opened, maximum use time is 6 months (even if not used). The carbon will absorb contaminants from the general environment. When contaminant can be detected by smell or taste.
How long does a filter last on a gas mask?
Most combined gas mask filters will last around 8 hours in a biological or chemical situation. Filters against specific chemical agents can last up to 20 hours. Airborne toxic materials may be gaseous (for example, chlorine or mustard gas), or particulates (such as biological agents).
How often do you need to change a filter on a gas mask?
As a rule of thumb, replace the cartridge filter as soon as you can detect the contaminant by taste or smell. The filter should also be replaced as per the expiry date of the filter stamped by the manufacturer. Once the filter is opened, it should compulsorily be changed within 6 months even if it is not used.
How long is a 40mm gas mask filter good for?
Standard 40mm NATO threads make it compatible with nearly all masks. Shelf life is rated at six years for gas and combination filters, and twelve years for particle filtration. It’s one of the most affordable filters that provide this level of protection.
Do unopened gas mask filters expire?
Yes. The filter component of the cartridge never really “expires” even if opened and left exposed to the atmosphere. The chemical cartridge component, which absorbs, adsorbs, or reacts with gases or vapors to remove them does eventually become ineffective, but that is not the current threat!
Are gas mask filters reusable?
Key things to remember about gas mask filters
If a gas mask filter is used against radioactive substances, mercury or other highly toxic substances, low-boiling organic substances, tear-producing and irritating substances, dangerous microorganisms, NOx or carbon monoxide, it cannot be reused!