MSS 90 Profiler | Microstructure Probe | Mikrostruktur Sonde

The MSS 90 is a multiparameter probe for  measuring micro-scale water stratification as well as the intensity of small scale turbulence in water down to approx. 500m.  The microstructure measuring system comprises the MSS profiler, a special winch, a probe interface and a data acquisition computer. The probe interface is adapted to the PC (laptop or desktop) via USB port.

The MSS is equipped with high resolution micro-structure and turbulence sensors (temperature, current shear) and standard CTD sensors (temperature, electrical conductivity, pressure).Additional sensors, e.g. oxygen, and light scattering,  can be attached. Maximum 9 sensors can be plugged to the profiler. House keeping sensors control disturbing vibrations and tilt of the profiler itself.

The MSS 90 can be used to carry out free sinking or rising measurements. Its sinking or rising velocity can be adjusted by a combination of weights and buoyancy elements.For measurements in shallow water (lakes, rivers, coastal waters) a mini version of the MSS is available (MSS 60). For measurement down to approx. 2000m,  a deep water version of the MSS can be offered.

For an overview of the MSS Profiler Family, see the MSS Profiler Family Sheet

Main Features

  • multiparameter measurements
  • microstructure, turbulence and standard CTD Sensors
  • additional optical sensors
  • depth range 400 m
  • free sinking or rising operation
  • adjustable sinking or rising velocity
  • 16 channels
  • resolution 16 bit
  • 1024 scans/s
  • baudrate 614 kbit
  • comfortable data acquisition and evaluation software


  • Titanium
  • Stainless Steel

Dimensions and Weights

  • L (housing) 800 mm
  • Ø (housing) 89 mm
  • L (overall) 1200 mm
  • W (in air) app. 8 kg
  • W (in air) app. 6 kg

The data acquisition and evaluation software run under Windows 95/98/2000/XP. Graphical quick-look functions are integrated into the data acquisition program. The data evaluation software has the structure of a tool-box. It consists of a management program and modules to perform various steps of computations. A hierarchy of different levels of data validation, parameter computation and data visualisation can be carried out. Parameters like dissipation rate, Cox number, Thorpe scale and others can be calculated, which give information on occurrence and intensity of micro-scale stratification, mixing, and transport processes.

For near to surface measurements, e.g. to carry out surface flux investigations, the MSS 90 can be operated as an uprising instrument. In this case, it is balanced with a positive buoyancy.
Depending on local con-ditions, the profiler can be operated via an under-water winch, a ship winch  or directly from shore with a guide pulley at the bottom. A buoyancy body prevents the transmission of cable generated vibrations to the profiler.

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