Well Monitoring Articles

  • A Brief History of Stevens` 116 Year Chart Recorder Legacy

    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 and record height of water was not accurate or ...

Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you