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Blog - 2
Turbidity & suspended solids instrumentation, historically based in Port Townsend, WA Product line now supported through Campbell Scientific, Inc.
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D & A Instruments
Turbidity monitors & water-quality instrumentation

Blog

  1. How Rapid Temperature Shifts Affect Turbidity Sensor Zero DriftWhen an optical turbidity monitor sits on a riverbank in the Hunter Valley one afternoon at 32 °C and is suddenly immersed in 14 °C meltwater the next morning,…
  2. Restoring a Hurricane-Ravaged Wetland with Optical Sensor NetworksWhen a category-four hurricane pushed a four-metre storm surge across a low-lying coastal marsh, the entire monitoring network that had tracked that estuary…
  3. Turbidity as a Stand-in for Pathogen Indicators at Recreational SitesWhen heavy southerly batters push across the NSW coast in autumn, the water at Bondi turns a milky green within hours, and council crews find themselves…
  4. Choosing optical path depth for turbidity monitoring in shallow streamsUnderstanding the depth of optical path in turbidity measurements for shallow streams requires two different dimensions to be kept separate. The first is the…
  5. Avoiding self-shading bias in floating optical sensor installationsOptical turbidity and suspended-solids sensors can provide valuable measurements from a floating platform, but the platform itself may distort the result.…
  6. Groundwater Profiling Permafrost Thaw Subsidence EffectsPermafrost thaw changes more than the shape of the ground. As ice-rich soil warms, pore water is released, depressions form, drainage pathways shift, and…
  7. How suspended-solids sensors support beach nourishment monitoringBeach nourishment is often described as a straightforward coastal protection measure: place compatible sand on an eroding shoreline and allow waves, tides, and…
  8. Fixed-point and profiling optical deployments in stratified reservoirsReservoirs are dynamic optical environments. Turbidity, suspended solids, algae and dissolved organic matter can change substantially with depth, while…
  9. A Framework for Quality Control Processing of Historical Turbidity DatasetsHistorical turbidity records are valuable long after a monitoring campaign has ended. They can reveal sediment pulses, dredging impacts, storm-driven runoff,…
  10. Characterizing Fouling-Resistant Optical Windows With Surface Energy CoatingsOptical windows are the working interface between a water-quality sensor and the environment it measures. In a turbidity monitor or suspended-solids probe,…