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Weekly data on the ground water level were recorded using water level recorder.
Interactive maps and near real-time data from creep-meters, strain-meters, tilt-meters, water level recorders and other geophysical instruments.
Besides the first water level recorder, the company invented several other innovative pieces of equipment, such as the Telemark water recorder which was patented in 1939.
In 1911, Leupold & Voelpel was contracted by John Cyprian (J.C.) Stevens to manufacture a water level recorder he had designed and patented.
