The ornamental design of the foldable gas detector, as shown and described.
FIG. 1 is a perspective view of the device our foldable gas detector in the closed position of showing our new design;
FIG. 2 is a top view of our new design in the closed position;
FIG. 3 is a bottom view of our new design in the closed position;
FIG. 4 is a front view of our new design in the closed position;
FIG. 5 is a back view of our new design in the closed position;
FIG. 6 is a side view of our new design in the closed position, the other side being a mirror image thereof; and,
FIG. 7 is a perspective view of our new design in the open position.
The broken line showing of various features is included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design.