The 104 Sonic Water Level Meter is a handheld, portable unit. It consists of a control unit and connected probe and is supplied with a plastic cover for larger wells and a field bag. The sonic probe transmits a sound wave into the well or pipe and measures the time for the pulse to return after contacting the water. Readings are shown on the clear LCD display on the control unit. The 104 Sonic Water Level Meter allows the programming of parameters like well diameter, offsets, temperature, etc. Maximum and minimum detection ranges can also be set to ignore any interference from known well features or obstructions, and to narrow down the measurement range for obtaining the most accurate water level readings possible.