Abstract: Improved respirator fit test devices including piezoelectric pumps that reduce noise and vibration of the device. The devices may include two or more piezoelectric pumps, wherein a first pump moves sheath air through a differential mobility analyzer and a second pump alternately moves aerosol from inside or outside a respirator through the differential mobility analyzer. A size selected portion of each aerosol sample is then moved through a condensation nuclei counter. Control circuitry enables user selection of a respirator type to be tested, wherein the differential mobility analyzer may be enabled or disabled based on the user selection. The control circuitry further enables calculation of a fit factor corresponding to a quantitative effectiveness of the respirator fitting a user based on signals from the condensation nuclei counter for each aerosol sample.

Abstract: The present disclosure provides an apparatus and methods for opening a valve of a respirator for respirator fit testing. An apparatus may include: a platform connecting a first end to a second end; wherein the first end is configured to attach to an adapter of a respirator, wherein the adapter comprises a base having a cavity configured to receive the first end; wherein the second end comprises at least one protrusion extending from the platform; wherein the at least one protrusion comprises a length capable of extending into a valve in a respirator; and wherein the at least one protrusion is inserted into the valve to open the valve.

Abstract: The present disclosure provides an apparatus and methods for opening a valve of a respirator for respirator fit testing. An apparatus may include: a first end, wherein the first end comprises a cavity, wherein the cavity is configured to receive a male post of an adapter; a second end, wherein the second end comprises at least one protrusion; and an internal flange, wherein the internal flange comprises an interlocking feature, wherein the interlocking feature is configured to interact with at least one circumferential groove spaced axially along the male post to establish at least one adjustable height; wherein the apparatus rotates clockwise or counterclockwise until the at least one protrusion is engaged with the valve, a valve housing, or a cross section within housing.

Abstract: A system, method, and computer program product for performing a respirator fit test. An example aspect is configured to: initiate a respirator fit test; detect at a processor, a signal from the respirator fit testing device; analyze data of the respirator fit test on the processor; troubleshoot in real time, without human intervention, at least one failure of the respirator fit test when a failing fit factor is detected; display to the user a subset of videos on a graphical user interface to correct the failure; and, perform the respirator fit test at least a second time.

Abstract: A system, method, and computer program product for performing a respirator fit test. An example aspect is configured to: instruct a user to select a respirator; instruct the user to connect at least one set of tubing to the respirator and a fit testing device; instruct the user to don the respirator; prompt the user to begin the respirator fit test; perform the respirator fit test upon receiving a positive response from the user; detect at a processor, a signal from the respirator fit testing device; analyze data of the respirator fit test on the processor; troubleshoot at least one failure of the respirator fit test when a failing fit factor is detected; display to the user a subset of videos on a graphical user interface to correct the failure; and, perform the respirator fit test at least a second time.