Electronic Instruments in the SediMeter ecosystem

Tripartite Flyers

SediMeter™ SM4 rev. 1

Stay tuned for the release of rev. 2 with two incredible new features: SediSond and bursts.


A combined turbidity / current velocity / current direction / pressure instrument.

SediMeter™ SM4

The SM4 rev. 2 is the original form factor, in that the instrument is inserted into a holder tube that is screwed down into the sediments.

The SM4P rev. 2 has the same electronics but a different form factor, that enables it to also function as a SediSond™ sediment profiler, from a boat or from ice.

SM4 and SM4P are available as kits

SediLink™ Radio Modem

The SediMeter and SediTrans instruments can be connected by cable, also in a network, and by using this SediLink radio modem one or more instruments can also be linked wirelessly over a radio link. Varios radio modules can be installed to be compliant with the laws of different countries.

The SediMeter™ System in Sediment Monitoring

System planning, connectivity, maintenance, interpretation, and reporting is also part of the job. We can assist, use the Contact form to get in touch. (These are older PDFs with some obsolete information.)

Nilsson Depth-Integrating Suspended Sediment Sampler

This is the original UNGI Report (Uppsala Naturgeografiska Institution) in which the development of the sample was described by Bengt Nilsson, PhD. This sampler was developed in the framework of the International Hydrological Decade, and became the de facto standard in about 60 countries. We have the original moulds and gigs so we can make new instruments according to the standard. We can also sell spare parts to existing samplers (such as bottles, intake tubes, and nozzles).

Why do suspended sediment sampling?

The SediTrans™ (and the SediMeter™) measure turbidity, so maybe you are aksing yourself, “why should I also have to take sediment samples and analyse the suspended sediment concentration (SSC)?” The answer is that the turbidity is reported in turbidity units such as FTU, which are related to SSC, but the correlation varies in time and space. That is why a number of SSC samples need to be taken while measuring FTU, and the correlation be determined. The method for determining the correlation has been investigated thoroughly by Dr. Margareta Jansson (link to be added!).

Earlier SediMeter™ models (no longer marketed)