The ornamental design for a converter for flowmeter, as shown and described.
FIG. 1 is a perspective view of a converter for flowmeter showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a right side view thereof, the left side view being a mirror image;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The broken lines in the figures are included for the purpose of illustrating the unclaimed portions of the converter for flowmeter and form no part of the claimed design.