A Brief History of Stevens’ 116 Year Chart Recorder Legacy
History / blog, chart recorder, Leupold & Volpel, water level
The legendary mechanical chart recorder for environmental monitoring dates back to 1911, when John C. Stevens invented the Type A chart recorder. In 1906, J.C. Stevens was the Hydrographer for the USGS out of Portland, Oregon, and was soon promoted to District Engineer. While with the USGS, he realized that hiring local citizens to observe […]