The ornamental design for a flowmetercase, substantially as shown and described.
FIG. 1 is a perspective view of a flowmeter case showing our new design;
FIG. 2 is a front elevation view thereof;
FIG. 3 is a rear elevation view thereof;
FIG. 4 is a right side elevation view thereof;
FIG. 5 is a left side elevation view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The flowmeter case is not limited to the scale shown herein. Broken lines of FIGS. 1-7 illustrate portions of the flowmeter case that form no part of the claimed invention.