Smoke taint sensing device

1. A plug for a container for storing liquid, the plug comprising:

a housing;

an input end at one end of the housing, the input end having a plurality of chambers;

a first sensor in a first sensor chamber inside the housing, the first sensor being configured to detect guaiacol;

a first filter near the input end of the plug, wherein the first filter selectively allows phenols including the guaiacol to enter a first input chamber of the plurality of chambers;

a first flow pathway between the first sensor chamber and the first input chamber;

a second sensor in a second sensor chamber inside the housing, the second sensor being configured to detect a second substance different from the phenols;

a second filter near the input end of the plug, wherein the second filter selectively allows the second substance to enter a second input chamber of the plurality of chambers; and

a second flow pathway between the second sensor chamber and the second input chamber.

2. The plug of claim 1 , wherein:

the first sensor is mounted on a first printed circuit board that is shaped to create the first flow pathway; and

the second sensor is mounted on a second printed circuit board that is shaped to create the second flow pathway, the second flow pathway being separated from the first flow pathway.

3. The plug of claim 2 , wherein:

the first printed circuit board is shaped to create an open space between a first edge of the first printed circuit board and the housing; and

the first flow pathway traverses the open space.

4. The plug of claim 2 , wherein the first sensor chamber has boundaries defined by i) the first printed circuit board, ii) the second printed circuit board, and iii) at least one of: the housing or a wall that extends between the first printed circuit board and the second printed circuit board.

5. The plug of claim 2 , wherein the first printed circuit board and the second printed circuit board are spaced apart from each other along an axis of the housing.

6. The plug of claim 5 , wherein the axis is a longitudinal axis of the housing.

7. The plug of claim 1 , further comprising:

a plurality of the second sensors; and

a processor that averages data sensed by the plurality of the second sensors.

8. The plug of claim 1 , wherein:

the first sensor comprises a plurality of sub-sensors;

individual sub-sensors of the plurality of sub-sensors detect different substances from each other; and

measurements from the individual sub-sensors are used to determine a presence of at least one of the phenols.

9. The plug of claim 1 , wherein:

the first sensor comprises a plurality of sub-sensors;

individual sub-sensors of the plurality of sub-sensors operate at different biases from each other; and

measurements from the individual sub-sensors determine a presence of at least one of the phenols.

10. The plug of claim 1 , further comprising a membrane over the input end, wherein the membrane prevents liquid from entering the plug.

11. The plug of claim 1 , wherein the plurality of chambers is arranged radially around a longitudinal axis of the housing.

12. A plug for a container for storing liquid, the plug comprising:

a housing;

an input end at an end of the housing, the input end having a liquid-impermeable membrane that allows gas flow to pass through;

a first sensor in a first sensor chamber inside the housing, the first sensor being configured to detect a smoke taint compound;

a first filter between the input end and the first sensor, wherein the first filter selectively allows phenols to pass through;

a second sensor in a second sensor chamber inside the housing, the second sensor being configured to detect a second substance different from the smoke taint compound; and

a second filter between the input end and the second sensor, wherein the second filter selectively allows the second substance to pass through.

13. The plug of claim 12 , wherein:

the first filter is in a first input chamber at the input end, the first input chamber being in fluid communication with the first sensor chamber via a first flow pathway;

the second filter is in a second input chamber at the input end, the second input chamber being in fluid communication with the second sensor chamber via a second flow pathway; and

the first flow pathway is separate from the second flow pathway.

14. The plug of claim 12 , wherein:

the first sensor is mounted on a first printed circuit board that is shaped to create a first flow pathway between the input end and the first sensor chamber; and

the second sensor is mounted on a second printed circuit board that is shaped to create a second flow pathway between the input end and the second sensor chamber.

15. The plug of claim 12 , wherein:

the first sensor is mounted on a first printed circuit board that forms a boundary of the first sensor chamber; and

a first flow pathway between the input end and the first sensor chamber traverses an open space between an edge of the first printed circuit board and the housing.

16. The plug of claim 12 , wherein the smoke taint compound is guaiacol or 4-methylguaiacol.

17. The plug of claim 12 , wherein the second substance is acetic acid, sulfur dioxide, or hydrogen.

18. The plug of claim 12 , wherein:

the first sensor comprises a plurality of sub-sensors;

individual sub-sensors of the plurality of sub-sensors detect different substances from each other; and

measurements from the individual sub-sensors are used to determine a presence of the smoke taint compound.

19. The plug of claim 12 , wherein:

the first sensor comprises a plurality of sub-sensors;

individual sub-sensors of the plurality of sub-sensors operate at different biases from each other; and

measurements from the individual sub-sensors are used to determine a presence of the smoke taint compound.

20. The plug of claim 12 , wherein:

the first sensor comprises a plurality of sub-sensors; and

measurements from individual sub-sensors of the plurality of sub-sensors determine a presence of phenols, to detect the smoke taint compound.