The ornamental design for a humidity and/or temperature sensor, as shown and described.
FIG. 1 is a top view of a humidity and/or temperature sensor;
FIG. 2 is a bottom view of the humidity and/or temperature sensor of FIG. 1;
FIG. 3 is a left-side view of the humidity and/or temperature sensor of FIG. 1;
FIG. 4 is a right-side view of the humidity and/or temperature sensor of FIG. 1;
FIG. 5 is a rear view of the humidity and/or temperature sensor of FIG. 1;
FIG. 6 is a front view of the humidity and/or temperature sensor of FIG. 1; and,
FIG. 7 is a perspective view of the humidity and/or temperature sensor of FIG. 1.
The broken line showing of structural features is included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.