Microstructure Probe MSS 90LH

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Microstructure Probe MSS 90LH

The MSS90LH is a heavy version of the MSS90L. Due to the larger mass, this probe is calmer in the water and thus less vibration occurs.
It is multiparameter probe for measuring micro-scale water stratification as well as the intensity of small scale turbulence in water down to approx. 500 m (optional for 1000 m).
The MSS90LH profiler may be equipped with up to 9 different sensors mounted at the bottom cap .

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.

Standard sensor equipment:

  • Pressure transducer
  • Temperature (PT100)
  • Conductivity
  • 2 x Shear
  • Fast temperature sensor (NTC)
  • Acceleration (vibrations) – intern

Additional sensors (max.3)

  • Turbidity
  • Oxygen
  • pH
  • Redox
  • Fluorometer
  • Tilt sensor (2axis)

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SKU: 30530010 Category:

Description

Microstructure probe MSS90LH

The MSS90 Profiler is an instrument for microstructure and precision measurements of physical parameters in marine and limnic waters. It is designed for vertical profiling within the upper 500 m (optional 1000 m).

Microstructure investigation requires an undisturbed measuring procedure of the profiling instrument. Effects caused by cable tension (vibrations) and the ship’s movement have to be excluded by buoyancy driven free sinking of the MSS Profiler. This requires a slack in the cable near to the profiler. The loop in the cable is generated and kept during the profiling by immersing sufficient cable into the water.

For vertical sinking measurements, the profiler has to be balanced with a slightly negative buoyancy which gives it a sinking velocity in the range between 0.3 to 0.7 m/sec.

The profiler can be handled and recovered manually. For more convenient operation, special portable winches are available. The serial data is transmitted via electrical cable to an on board unit and further to a data acquisition PC. The on board unit generates the power supply for the profiler and the receiver of the data link. Raw data is stored online on the hard disc of the acquisition PC during the measuring process.

The basic hardware system for microstructure field measurements consists of several parts:
1. Microstructure profiler
2. Interface for power supply and data link to PC
3. Sea cable connection between interface and profiler
4. PC, Laptop or Notebook with USB-Interface
5. Winch (*) manual or electrical
(*) A winch is not necessarily required for system operation but makes the handling of the system during operation easier and more comfortable.

The measuring system can be powered either by mains (230VAC or 115VAC, standard version) or battery (12 VDC, option).

For data acquisition the high speed Micro-Structure Data Acquisition program MSDA is used. MSDA displays the received data and stores it on hard disk. Graphical functions enable a convenient operation of the system.

Standard sensor equipment:

  • Pressure transducer
  • Temperature (PT100)
  • Conductivity
  • 2 x Shear
  • Fast temperature sensor (NTC)
  • Acceleration (vibrations) – intern

Additional sensors:

  • Turbidity
  • Oxygen
  • pH
  • Redox
  • Fluorometer
  • Tilt sensor (2axis)

Main features:

  • up to 9 sensors + internal sensors
  • non-corrosive titanium housing
  • depth range up to 500 m (optional 1000 m)
  • adjustable sinking or rising velocity
  • 16 channels
  • 1024 scans/s
  • resolution 16 bit
  • baudrate 614 kbit
  • easy data acquisition and evaluation software
ten year warranty

Additional information

Max. Depth

up to 50 m, up to 100 m, up to 200 m, up to 500 m

Field of Application

Brackwater, Drinking water, Ground water, Fresh water, Salt water, Offshore

Measuring mode

Online

Special functions
Conductivity

0 – 10 ms/cm, 0 – 70 ms/cm, 0 – 300 ms/cm

Temperature PT100

From -2 – 36°C, From -2 – 60 °C

Turbidity

0 – 25 ftu/ntu, 0 – 125 ftu/ntu, 0 – 500 ftu/ntu, 0 – 4000 ftu/ntu

Fluorometer

CDOM/FDOM, Chlorophyll A, Crude Oil, Fluorescein, Optical Brighteners, Phycocyanin, Phycoerythrin, PTSA, Refined Fuels, Rhodamine, Tryptophan

Light irradiance

BI QCP2300, BI QSP2200, Li-Cor 192SA, Li_Cor 193SA, Satlantic PAR

pH

H2S resistant, Standard

Oxygen

CLARK, Optical

Redox

H2S resistant, standard

Special sensors

Acceleration, Altimeter, Bottom indicator, Compass, Shear, Temperature NTC

The sea cable has an almost neutral buoyancy and can carry weights of more than 50 kg. If the system is ordered without a winch, a cable drum with slip rings is provided for the transport of the sea cable. The cable is fitted with the proper underwater inline connector SUBCONN MCIL5F, locking sleeve SUBCONN MCDLSF and on the ship side with a LEMOSA 4-pole round connector. The cable drum is not intended to be used as hand winch, cable handling has to be made manually.

For more convenient operation, a special portable winch can be used. The data are transmitted via electrical cable to a board unit and further to a data acquisition PC. The on board unit comprises the power supply for the profiler and the receiver of the data link. The data are stored on the hard disc of the acquisition PC during the measuring process.

According to the different data transmission links to the profiler SST
offers two board units for data interfacing and power supply:

USB-Interface

  • 115/230VAC or /and battery powered (9..36VDC)
  • RS485 data link to profiler
  • USB2 port for PC connection

Probe

    • Supply voltage: 18…72 VDC (will be supplied by the USB-Interface)
    • Power consumption: app. 0,5 W (sensor dependent)
    • Serial port: RS-485
    • Data transmission : 1024 sets/s
    • Connector: SUBCON MCBH5M Ti

Probe materials:

  • Titanium

Dimensions and Weights

  • Length (housing): 1270 mm
  • Length (protection frame): 1600 mm
  • Diameter (housing): 89 mm
  • Weight (in air): approx. 15 kg
  • Wooden transport box
  • MSS90
  • Probe user manual
  • Software manual SST-SDA
  • Calibration documents
  • Software
  • Buoyancy ring with fringe
  • Buoyancy ring large
  • Strain relief
  • Hexagon key
  • Shackle
  • Dummy cap
  • Configuration cable (5m)
  • Additional O-rings (spare parts)
  • Additional screws (spare parts)
  • Silicon grease

We offer calibration of several probes and sensors

  • Pressure (dead weight tester)
  • Temperature: Millikelvin Thermometer Pt 100 (ITS 90, IEC 751)
  • Conductivity: Salinometer, Guildline Autosal 8400B / Portasal 8410A (standard sea water)
  • pH / Redox (buffer solutions)
  • Oxygen