The Model 102 Water Level Meter by Solinst has been designed for measuring ground water levels, especially in small diameter tubes and piezometers. The Model 102 uses a 9-volt battery and a small-diameter probe on narrow coaxial cable. The cable has a heavy-duty jacket and stainless steel inner conductor for strength. Stock lengths are 100-, 300-, 500- and 1,000-feet, with other lengths also available. Solinst Canada Ltd., Card No. 181
