FIG. 1 is a front perspective view of an ionic meter incorporating the design;

FIG. 2 is a back perspective view thereof;

FIG. 3 is a front plan view thereof;

FIG. 4 is a back plan view thereof;

FIG. 5 is a top elevational view thereof;

FIG. 6 is a bottom elevational view thereof;

FIG. 7 is a side elevational view thereof as seen from the left side;

FIG. 8 is a side elevational view thereof as seen from the right side; and,

FIG. 9 is a front perspective view of the meter of FIGS. 1-8 which incorporates a face plate having iconic markings thereon defining a user interface.