The Rugged Water Level Tape 100 is an economical model of the Rugged Water Level Tape 200, with a Kevlar-reinforced polyethylene tape and stainless steel conductors. This affordable tape offers long-lasting performance for well drillers, pump installers and other service users. The tape signals the water level with a bright LED flash and loud buzzer. When the probe reaches the water level, the water acts as the on/off switch.