FIG. 1 is top view of the peak flow meter; FIG. 2 is a front elevational view of the peak flow meter; FIG. 3 is a side elevational view of the peak flow meter, the opposing side view is a mirror image of that shown in FIG. 3; FIG. 4 is a back, perspective view of the peak flow meter; and, FIG. 5 is a front, perspective view of the peak flow meter.