Water/wastewater
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Durable and inexpensive, the Model 102 Coaxial Cable Water Level Indicators from Solinst (Canada) are designed to accurately measure water levels in narrow applications. They use a choice of two small diameter probe designs, attached to narrow coaxial cable, fitted on an ergonomic reel. The cable has accurate laser markings every millimeter or 1/100 ft, in lengths up to 300 m (1000 ft). A 9V battery powers the Indicator.
IET 36.3 May