Solinst 101 P2 Water Level Meters use non-stretch polyethylene flat tape, with heat embossed markings each 1/100 ft or mm. Designed for measuring accurate water levels in wells and boreholes, the rugged free-standing reel is well balanced and ideal for use in the field. The P2 Water Level Meter is available with tape lengths to 1000 ft (or 300 m).