Designed with non-stretch tape, the Solinst Model 101 Water Level Indicator has heat embossed markings every 1/100 ft or millimeter. The dog-bone design of the tape avoids adherence to wet surfaces, allowing accurate readings every time. The stranded stainless steel conductors provide extra strength and protection against corrosion. Designed for gaining highly accurate water level measurements in wells and boreholes, the rugged design is ideal for use in the field. The Model 101 Water Level Indicator is powered by a 9V battery that is stored in an easy access drawer located on the front of the free-standing reel. P6 pressure-proof probe is now available. Similar to the P2 probe, the simple design is easy-to-clean, and hangs straight in wells.