A rapid-testing mask is worn by a user, and includes a covering portion, a strap portion and a rapid-testing portion. The covering portion is provided to cover the mouth and the nose of the user. The covering portion includes an inner layer close to the user and an outer layer opposite to the user. The strap portion is connected to the covering portion and is worn on the user. The rapid-testing portion is arranged on the inner layer of the covering portion, and receives a gas exhaled from the mouth or the nose of the user to generate an indication signal according to the gas. The indication signal is a rapid-testing result of whether the user is suffering from diseases of pneumonia, influenza and COVID-19 (Coronavirus disease 2019), to monitor health status of the user in real time.

A rapid-testing mask is worn by a user, and includes a covering portion, a strap portion and a rapid-testing portion. The covering portion is provided to cover the mouth and the nose of the user. The covering portion includes an inner layer close to the user and an outer layer opposite to the user. The strap portion is connected to the covering portion and is worn on the user. The rapid-testing portion is arranged on the inner layer of the covering portion, and receives a gas exhaled from the mouth or the nose of the user to generate an indication signal according to the gas. The indication signal is a rapid-testing result of whether the user is suffering from diseases of pneumonia, influenza and COVID-19 (Coronavirus disease 2019), to monitor health status of the user in real time.

A method of assembling a personal air purifying respirator includes assembling a housing including a blower disposed therein, a filter cavity, and an outlet manifold; installing a filter on the housing; attaching a filter cover to the housing with the filter cover disposed over the filter, wherein the filter cover defines an air inlet; and testing the filter including energizing the blower, introducing a testing aerosol into the air inlet, and measuring air exiting the outlet manifold.

An apparatus with multipurpose pressure sensitive materials, includes an outer part and a pressure sensitive material. The sensitive material is configured to change colors according to contact state between the outer part with an object and/or according to the outer part itself.

Provided is a mask fitting level determination device that has a significantly simple component configuration, that can be driven by a battery, that can be reduced in size to a palm size, that is inexpensive, that is operated by a simple operation method, and that does not require proficiency for accurate measurement. The mask fitting level determination device includes: a mask inner pressure detection unit 2 that is inserted between a face surface F of a mask wearing person and a worn mask 1; and a circuit control unit that sets a predefined threshold value in accordance with strength of breathing of the mask wearing person and determines a fitting level on the basis of a reference pressure value and a mask inner pressure value measure by the mask inner pressure detection unit 2; and a display unit 3 that displays the fitting level determined by the circuit control unit to the mask wearing person.

A system may include a computer-readable storage media configured to store instructions. The system may also include one or more processors communicatively coupled to the one or more computer-readable storage media. The one or more processors may be configured to, in response to execution of the instructions, cause the system to perform operations. The operations may include measuring a pressure of a volume while a user wears a mask and breathes. The volume may be defined by an interior surface of the mask and a face of the user. The operations may also include determining a differential pressure due to the mask. The differential pressure may be equal to a difference between the pressure of the volume and an ambient pressure of an environment proximate an exterior surface of the mask. In addition, the operations may include determining a mask leakage rate of the mask based on the differential pressure.

A system may include a computer-readable storage media configured to store instructions. The system may also include one or more processors communicatively coupled to the one or more computer-readable storage media. The one or more processors may be configured to, in response to execution of the instructions, cause the system to perform operations. The operations may include measuring a pressure of a volume while a user wears a mask and breathes. The volume may be defined by an interior surface of the mask and a face of the user. The operations may also include determining a differential pressure due to the mask. The differential pressure may be equal to a difference between the pressure of the volume and an ambient pressure of an environment proximate an exterior surface of the mask. In addition, the operations may include determining a mask leakage rate of the mask based on the differential pressure.

A facemask configured to be used by multiple sized/shaped heads can include a primary, a secondary and a tertiary seal. In some embodiments, the primary seal is contact with the nose and cheek regions; the secondary seal is in contact with the chin region; and the tertiary seal is in contact with the cheek and chin regions. In some embodiments, the tertiary seal extends inwardly and outwardly when applied to the face. In some embodiments, the mask includes test scissors.

A facemask configured to be used by multiple sized/shaped heads can include a primary, a secondary and a tertiary seal. In some embodiments, the primary seal is contact with the nose and cheek regions; the secondary seal is in contact with the chin region; and the tertiary seal is in contact with the cheek and chin regions. In some embodiments, the tertiary seal extends inwardly and outwardly when applied to the face. In some embodiments, the mask includes test scissors.

An exposure-indicating supplied air respirator system comprises a head top, a clean air supply source and a portable personal communication hub. The head top comprises a visor that is sized to fit over at least a user's nose and mouth, a position sensor secured to the head top, and a head top communication module. The clean air supply source is connected to the head top that supplies clean air to the interior of the head top. The position sensor detects whether the visor is in a closed position or in an open position and the head top communication module communicates the visor position to the personal communication hub. If the personal communication hub receives a signal indicating the presence of a hazard, and if the visor is in an open position, an alert is generated.