The new Solinst Model 102 Water Level Meter is made to measure groundwater levels in small diameter applications. Solinst Coaxial Cable Water Level Meter It features narrow coaxial cable that is laser marked every 1/100 feet, in lengths up to 1000 feet. It comes in two slim probe designs; the heavier 3/8-inch diameter P2 brass probe is ideal for deeper applications. A 1/4-inch stainless steel probe is also available. Segmented weights add flexibility. Its LED light and loud buzzer indicate water level. Sensitivity can be adjusted to suit your application. For more information, visit