- Capture particles in the air, such as dusts, mists, and fumes
- Does not protect against gases or vapors
- Generally becomes more effective as particles accumulate on the filter and plug spaces between the fibers
- Filters should be replaced when user finds it difficult to breath through them
|
- Are normally used in atmospheres that contain hazards of both particulates and gases
- Have both particulate filters and gas/vapor filters
- May be heavier
|
- Are normally used when there are only hazardous gases and vapors in the air
- Use chemical filters (called cartridges or canisters) to remove dangerous gases or vapors
- Does not protect against airbore particles
- Are made to protect against specific gases or vapors
- Provide protection only as long as the filter's absorbing capacity is not depleted
|