Sensor systems comprising auxiliary articles

1. A sensor system for detecting a property of or within an absorbent article, comprising:

an absorbent article comprising a garment facing layer of a vapor permeable, liquid impermeable backsheet and an absorbent assembly;

an auxiliary article comprising a sensor, wherein said auxiliary article is a distinct article from the absorbent article, the auxiliary article adapted to fit over the absorbent article, and wherein the auxiliary article does not comprise an absorbent assembly;

the auxiliary article comprising front and back waist regions, and a crotch region;

wherein the sensor is oriented such that it overlaps the crotch region and at least one of the front and back waist regions;

wherein the sensor is oriented externally adjacent the garment facing layer when the auxiliary article is fitted over the absorbent article;

wherein the sensor is disposed between two layers of the auxiliary article;

wherein the sensor is not physically attached to the absorbent article when the sensor is in use; and

wherein the sensor is configured to sense a change in condition of the absorbent article.

2. The sensor system of claim 1 , wherein the sensor is configured to sense temperature, humidity, density, optical changes, acoustical changes, chemical changes, changes in thickness of the absorbent article, and/or changes in material properties, of the absorbent article.

3. The sensor system of claim 1 , wherein the sensor is non-conductive.

4. The sensor system of claim 1 , wherein the sensor comprises a carrier housing.

5. The sensor system of claim 1 , wherein the sensor is discrete from the auxiliary article and is attached to an interior surface of the auxiliary article.

6. The sensor system of claim 1 , wherein the sensor is integral with the auxiliary article.

7. The sensor system of claim 1 , wherein the sensor and auxiliary article are washable.

8. The sensor system of claim 1 , wherein the auxiliary article is a non-absorbent article.

9. The sensor system of claim 1 , wherein the absorbent assembly comprises an absorbent core, wherein the absorbent core is air felt free.

10. The sensor system of claim 1 , wherein a portion of the sensor has a bending modulus less than 2.0E+09 N/m2.

11. The sensor system of claim 1 , wherein a portion of the sensor has a bending modulus less than 1.0E+08 N/m2.

12. The sensor system of claim 1 , wherein a portion of the sensor has a bending modulus less than 1.0E+06 N/m2.

13. The sensor system of claim 1 , comprises one or more apertures.

14. The sensor system of claim 1 , wherein the auxiliary article comprises a pocket configured to receive the sensor, wherein the pocket has a length of at least 5 mm greater than the length of the sensor.

15. The sensor system of claim 1 , wherein the auxiliary article comprises a pocket configured to receive the sensor, wherein the pocket has a length of at least 10 mm greater than the length of the sensor.

16. The sensor system of claim 1 , wherein the auxiliary article comprises a pocket configured to receive the sensor, wherein the pocket has a length of at least 15 mm greater than the length of the sensor.

17. The sensor system of claim 1 , wherein the garment-facing layer has a WVTR from 500 to 8,000 g/m 2 /24 hours.

18. The sensor system of claim 1 , wherein the garment-facing layer has a WVTR from 1000 to 6,000 g/m 2 /24 hours.

19. The sensor system of claim 1 , wherein the garment-facing layer has a WVTR from 2,000 to 4,000 g/m 2 /24 hours.

20. The sensor system of claim 1 , wherein the sensor is capable of predicting conditions indicative of a subsequent incontinent event based on the change in a property.