An inlet chamber defines a flow passage leading into a breathing chamber. A first check valve is located between the inlet chamber and the breathing chamber. The first check valve is configured to allow air flow from the inlet chamber into the breathing chamber. A second check valve is located between the breathing chamber and an exhaust chamber. The second check valve is configured to allow air flow from the breathing chamber into the exhaust chamber. An ultraviolet light source is configured to administer a dose of ultraviolet light sufficient to decontaminate gas flowing through either the inlet chamber, the exhaust chamber, or both.

An inlet chamber defines a flow passage leading into a breathing chamber. A first check valve is located between the inlet chamber and the breathing chamber. The first check valve is configured to allow air flow from the inlet chamber into the breathing chamber. A second check valve is located between the breathing chamber and an exhaust chamber. The second check valve is configured to allow air flow from the breathing chamber into the exhaust chamber. An ultraviolet light source is configured to administer a dose of ultraviolet light sufficient to decontaminate gas flowing through either the inlet chamber, the exhaust chamber, or both.

Portable containment device having a chamber which further includes a first end, a second end, and a vertical wall, wherein a filter is arranged at the second end to entrap airborne particles emitted into an opening formed at the first end of the portable containment device.

Portable containment device having a chamber which further includes a first end, a second end, and a vertical wall, wherein a filter is arranged at the second end to entrap airborne particles emitted into an opening formed at the first end of the portable containment device.

A self-sterilizing, face mask, respirator, open or enclosed face shield employs germicidal, far UV-C light safe for direct human exposure, mitigating risk of acquisition or transmission of respiratory pathogens, such as COVID 19. Device attachments or special lenses direct far UV-C light into the respiratory chamber and/or reservoir areas of infection including nasal, oropharyngeal or ocular areas to reduce or eliminate pathogens, serving also as a treatment modality. In a preferred embodiment the face shield has a removable front section, which can be exchanged or replaced with sections that include various functional attributes while maintaining germicidal protections and avoiding need to remove PPE during these activities including consumption of liquids, oral medications or food, as well as providing antimicrobial absorbent sneeze or cough guard or rhinorrhea secretion absorption, or a communication device to address communication deficiencies caused by respiratory protection barriers.

An upper body positive pressure protection system protects the user from aerosolized contaminants and isolates a user's entire upper body from a contaminated environment. Filtered air is supplied to the suit by a reusable, rechargeable blower unit to ensure a non-contaminated and portable air supply for continuous positive pressure to the upper body suit. The blower unit is portable with the user and can be supported by a shoulder and waist belt harness. The reusable or disposable upper body suit can be constructed from a lightweight, splash/fluid resistant material that incorporates a clear face shield to allow appropriate visibility to the user. A reusable, adjustable head harness worn within a hood of the suit provides fixed positioning of the face shield relative to the user's face. Suit air exit vents may optionally include filters for capturing any biological contaminants the user may be expelling.

An upper body positive pressure protection system protects the user from aerosolized contaminants and isolates a user's entire upper body from a contaminated environment. Filtered air is supplied to the suit by a reusable, rechargeable blower unit to ensure a non-contaminated and portable air supply for continuous positive pressure to the upper body suit. The blower unit is portable with the user and can be supported by a shoulder and waist belt harness. The reusable or disposable upper body suit can be constructed from a lightweight, splash/fluid resistant material that incorporates a clear face shield to allow appropriate visibility to the user. A reusable, adjustable head harness worn within a hood of the suit provides fixed positioning of the face shield relative to the user's face. Suit air exit vents may optionally include filters for capturing any biological contaminants the user may be expelling.

An air-filtering protection device includes a filtering mask and an actuating and sensing device. The filtering mask is for being worn to filter air. The actuating and sensing device is mounted and positioned on the filtering mask and includes at least one sensor, at least one actuating device, a microprocessor, a power controller and a data transceiver. The at least one actuating device is disposed on one side of the at least one sensor and includes at least one guiding channel. The actuating device is enabled to transport air to flow toward the sensor through the guiding channel so as to make the air sensed by the sensor.

An air-filtering protection device includes a filtering mask and an actuating and sensing device. The filtering mask is for being worn to filter air. The actuating and sensing device is mounted and positioned on the filtering mask and includes at least one sensor, at least one actuating device, a microprocessor, a power controller and a data transceiver. The at least one actuating device is disposed on one side of the at least one sensor and includes at least one guiding channel. The actuating device is enabled to transport air to flow toward the sensor through the guiding channel so as to make the air sensed by the sensor.

Methods and systems are provided for a multiplexed phase separating inertial filter that is composed of helical through holes generating centrifugal separating forces. In one example, the inertial filter may be a planar porous material with an array of helical channels, each helical channel of the array of helical channels extending from a top surface of the porous material to a bottom surface of the porous material.