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SediMeter™
Measures the Bottom with a Unique, Patented Sensor
*Optional sensors
For environmental monitoring of coral reefs, fish farms, dredging, etc
The SediMeter™ is designed for detecting minute changes in bottom elevation. It can be used for monitoring the accumulation of sediments, and resuspension of gyttja.
The sensor consists of an array of 36 infrared optical backscatter detectors. The turbidity is measured every 10 mm, and the bottom level estimated to 0.1 mm.
This totally redesigned SediMeter™ offers optional sensors for pressure and visible light. Temperature with 0.01ºC resolution is standard.
The SediMeter™ comes with a computer software for setup, download, data analysis, and real-time monitoring of a network of hundreds of SediMeters. Furthermore, it can act as a web server so the monitoring can be supervised from the internet.
Optional pressure and light sensors can be sampled up to 84 times per measurement, with a user-selectable frequency. Wave periods can be estimated from these data.
SediMeter model 2 is presently available in 3 versions to fit both scientific needs and environmental monitoring requirements.
Read more about specifications, the sensor, the software, download manuals and software, or visit the online shop
The SediMeter reports turbidity in the unit FBU. It is a kind of Formazin Turbidity Units (FTU), similar to the ISO 7027 standard of FNU (Formazin Nephelometric Units). The difference is that the scattered light is measured at 180 degrees rather than 90 degrees, and that the near infrared (NIR) wavelength is 945 nm rather than 860 nm. The somewhat longer wavelength helps decrease the influence of ambient light, as does a new measuring and compensation procedure. The ISO standard (as well as the US standard, NTU) of 90 degree scatter is incompatible with measuring very high concentrations—they would report low concentration values rather than high when buried.
Feedback
“...recommending that sedimeters be installed to monitor sedimentation on reef tracts..."
Coastal Engineering Administrator in Florida Department of Environmental Protection
"...dredge monitoring ... there is not much out there that is as simple and cost effective."
Senior Environmental Scientist in an engineering consulting company
Application Example: Spill Monitoring
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