0.1 to 0.3 micron
The shelf life of 3M N95 respirators is 3 years from the date of manufacture if stored and transported under the following conditions:Original packagingStorage conditions between 4ºC to 50ºCRelative Humidity not exceeding 90%Packaging and all contents must remain dry, stored away from direct sunlightTo check on the expiry date of the respirator, please refer to the Lot Number printed on the respirator. If the Lot Number shows a number LOWER than XXXXX, the respirator is expired.
An N95 or similar mask will filter viruses (H1N1 included) But its not the micron filtration size that needs to be focused on, its the proper fit of the mask. Leaks from improper fit and deep breaths will severely limit the effectiveness of simple filter masks. The other consideration is behavior while masked. Wiping the eyes, picking your teeth under the mask, etc.
The respirator masks that are designated with the filter class of N95 means that the respirator filter will block at least 95% of small particles. The N refers to its properties related to oil resistance of the mask: N = Not Oil Resistant, R = Oil Resistant, P = Oil Proof
Used Nokia N95 will be about 1500 riyals
Not if you are wearing it to protect you from viruses or other sub-microscopic pathogens or pollution/fumes. These N95 masks are more like respirators than a cloth or paper surgical mask. None of these should be reused when used for medical purposes, they should be thrown away after each use since they may harbor some of the filtered particles on the outside that could contaminate people or environments. They can not be washed for reuse, either, this will potentially deform or disintegrate the mask rendering it ineffective. N95 masks must also be medically fit to your face or they will not be effective. They are not recommended for children or those with beards or mustaches because that can allow gaps for particles to enter around the mask. See more in the related questions section.
The sides of the mask should dimple inwards when you inhale sharply. And bulge slightly when you exhale. That is for the N95 Respiraotor Masks we have here anyway.
Use a bag valve mask (BVM) to minimize possible bloodborne exposure. Using the BVM will allow the use of a mask on the face to minimize airborne exposure.
It isn’t always easy to buy one or two masks and continue using them, because every mask has its own life. Wondering where to buy face masks for you and your family in bulk, preferably a little cheaper too? Simply log on to accumed and you will notice how it actually is your one-stop destination. Name the type of mask and they have it for you, in bulk and at a slightly reduced price range too.
The N95 is going to filter 95% of the particles in the air, hence the name N95. It will protect the respiratory system against lead, however, the largest worry with lead is topical exposure, or exposure from skin contact. While the mask will protect your respiratory system from the lead particles, if you are grinding or sawing, bare skin will still be exposed. If you are extremely worried about protecting the respiratory system, then the P100 is the next best thing to an SCBA. The downside to the P100 is the upkeep, the training, and the record keeping required by OSHA.
They should be thrown away after each use or before, if they become wet or more difficult to breathe through.
I think the N95 is beter