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1. WO2019046712 - FIT-TEST METHOD FOR RESPIRATOR WITH SENSING SYSTEM

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[ EN ]

What is claimed is:

1. A fit testing method comprising:

providing a respirator donned by a wearer;

providing a sensor in electrical communication with a sensing element, wherein the sensor is configured to monitor a particulate concentration parameter of a gas space within the respirator, and a second particulate concentration parameter of a gas space outside the respirator, wherein the sensor is attached to the respirator such that the respirator such that the weight of the sensor is supported by the respirator; and

providing a reader configured to communicate with the sensor, wherein the reader is configured to provide a respirator fit parameter based on a comparison of the particulate concentration within the respirator to the particulate concentration parameter outside the respirator.

2. The method according to claim 1, wherein the sensor is mounted substantially on an exterior surface of the respirator.

3. The method of claim 1 or 2, further comprising an aerosol generator with a known aerosol output parameter.

4. The method of any of the preceding claims, further comprising an enclosure that is physically supported around the wearer's head, wherein the aerosol generator delivers aerosol with the known aerosol output parameter that is at least partially contained within the enclosure around wearer's head.

5. The method of claim any of the preceding claims, wherein a size of the sensor and a weight of the sensor are selected such that the sensor does not interfere with a wearer's use of the respirator.

6. The method according to any of the preceding claims, wherein a size of the sensor and a weight of the sensor are selected such that the sensor does not alter the fit of the respirator on a wearer.

7. The method according to any of the preceding claims, wherein the sensor is in electrical communication with the sensing element and is configured to sense a change in an electrical property of the sensing element.

8. The method according to any of the preceding claims, wherein the sensing element is configured to sense fluid-soluble particulate matter when a liquid layer is disposed in a gap between at least two electrodes on at least a part of the surface of the sensing element, wherein a fluid ionizable particle may at least partially dissolve and may at least partially ionize in the liquid layer, resulting in a change in an electrical property between at least two electrodes of the sensing element.

9. The method according to any of the preceding claims, wherein the sensor is configured to detect leakage of unfiltered air into the respirator.

10. The method according to any of the preceding claims, wherein the sensing element is in removable communication with the sensor.

11. The method according to any of the preceding claims, wherein the sensor communicates with the reader about physical properties related to a gas within the respirator.

12. The method according to any of the preceding claims, wherein the sensor communicates with the reader about parameters used to assess performance of exercises by a wearer of the respirator.

13. The method according to any of the preceding claims, wherein the sensor communicates information to the reader about constituents of a gas or aerosol within the respirator and outside the respirator, respectively.

14. The method according to any of the preceding claims, wherein the sensor and reader communicate with one another about one or more constituents of a gas or aerosol within the respirator.

15. The method according to any of the preceding claims, wherein the sensor and reader communicate with one another about physical properties related to a gas within the interior gas space.

16. The method according to any of the preceding claims, wherein the sensor and reader communicate parameters used to assess performance of exercises by a wearer of the respirator.

17. The method of claim 8, wherein at least one component of the liquid layer is provided by human breath.

18. The method of claim 8, wherein interaction of the fluid ionizable particle with the sensing element is at least partially influenced by human breath.

19. The method according to any of the preceding claims, wherein the sensing element is configured to be mechanically separable from the sensor.

20. The method according to claim 18, wherein the sensing element is a fluid ionizable particulate matter detection element configured such that the condensing vapor does not condense uniformly on the surface of the element.

21. The method according to claim 20, wherein the fluid ionizable particulate matter detection element is further configured such that condensed vapor in contact with at least one electrode does not form a continuous condensed phase to at least one other electrode.

22. The method according to any of the preceding claims, wherein the reader is configured to be in wireless communication with the sensor.

23. The method according to any of claims 1 to 21, wherein the reader is on the same electric circuit as the sensor.

24. A respiratory fit test system comprising a method according to any of the preceding claims.