The Fisher Labs WLT100M Water Level Indicator with 100 M Cable provides an economical and reliable means of obtaining accurate water level data in water wells. An LED indicator and an audio alert signal contact of the electrode assembly with the water surface. The brass electrode assembly is 3/8 in. in diameter and can be replaced in the field. The 100 M cable is two-conductor, steel and copper plated, with a tensile strength of approximately 300 pounds and a tough plastic insulating jacket. It is mounted on a small handheld spool and stand to conveniently extract or withdraw the cable and electrode assembly. Depth measurement is indicated by numbered metal tags securely crimped to the cable at intervals of one meter.