FIG. 1 is a perspective view of a pen recorder housing showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a rear plan view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top end view thereof; and,

FIG. 7 is a bottom end view thereof.