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CTD90

CTD90

Online probe

The CTD90 is a high quality, high accuracy online multi parameter probe with max. 9 sensors for oceanographic and limnological measurement of physical, chemical and optical parameters for depth up to 6000 m.

Sea & Sun Technology
Trappenkamp, DE

Description

The CTD90 is a high quality, high accuracy online multi parameter probe with max. 9 sensors for oceanographic and limnological measurement of physical, chemical and optical parameters for depth up to 6000 m.

The probe allows operation in different modes:

  • online mode (RS-232): it will automatically transmit data on the RS-232 line as soon as the probe is powered and the appropiate port is activated.
  • online mode (FSK-option). Operation on single conductor cables (coaxial cables) requires a special power supply interface with a FSK demodulation circuitry.
    PC is connected to the interface either by COM port or USB 2.0 port.

The CTD90 is equipped with a 16 channel data aquisition system with 16 bit resolution.
A high long-time stability and automatic self-calibration of the analogue digital converter guarantees stable and precise CTD measurements for many years.

The supplied Standard Data Acquisition Software package “SST-SDA” includes the handling of the logging process and the display of online or recorded data with a shared graphic user interface. The “SST-SDA” is a part of our shipment.

The system is able to control and operate motor driven water-sampler rosettes (e.g. from Hydro-Bios).

Standard models:
CTD90:
Online probe for measurement of conductivity, depth, temperature + 6 optional sensors

Standard sensors:

  • Conductivity (Š”)
  • Temperature (T)
  • Pressure (D)

Additional sensors:

  • Oxygen
  • Turbidity
  • pH (also H2S-resistant)
  • Redox (OPR) also H2S-resistant
  • Fluorometer
  • Light irradiance(PAR)
  • Transmissiometer
  • Altimeter
  • H2S (hydrogen sulfid)
  • Currentmeter (with compass)

Calculated parameters:

  • salinity
  • sound velocity
  • Kappa 25 mS/cm
  • sigma

Main Features:

  • easy handling
  • up to 9 sensors
  • non-corrosive titanium housing (titanium)
  • depth range up to 6000 m
  • control and operation of water samplers and plancton nets
  • SDA data acquisition software running under various versions of Microsoft Windows
    (a part of the shipment)
  • calculations according to UNESCO formulas

Specifications

General

Weight in air [kg]

6

Diameter [mm]

90

Length [mm]

600

Housing Material

Titanium

Max. cable length [m]

6000

Observations

Min. depth increment [m]

0.1

Min. time increment [s]

0.2

Resolution of salinity [psu]

0.001

Uncertainty of salinity [psu]

0.002

Min. sound velocity [m/s]

1400

Max. sound velocity [m/s]

1600

Resolution of sound velocity [m/s]

0.05

Uncertainty of sound velocity [m/s]

0.1

Operation Characteristics

Data display on dedicated hardware

N

Method of first recording

external

Display of analogue data

Y

Pressure, temperature and conductivity sensor

Pressure sensor

Y

Type of pressure sensor

piezo resistive

Resolution of pressure [% FS]

0.002

Accuracy of pressure sensor

up to 0.05

Temperature sensor

Y

Type of temperature sensor

Pt 100 4-pole

Min. temperature [Ā°C]

-2

Max. temperature [Ā°C]

36

Resolution of temperature [Ā°C]

0.0005

Accuracy of temperature measurement

Ā± 0.002

Conductivity sensor

Y

Type of conductivity sensor

7-pole-cell

Max. conductivity [S/m]

70

Resolution of conductivity [10^-3 S/m]

0.0005

Accuracy of conductivity measurement

Ā± 0.002

Uncertainty of pressure [% FS]

130

Software specifications

Software name

SST-SDA

Graphical presentation

Y

Raw data editing

Y

Re-computation with raw data

Y

CTD Probe controller

Y

Recording with third party software

N

Environmental

Max. depth [m]

6000

Max. pressure [bar]

600

Operating temperature: min. [Ā°C]

-10

Operating temperature: max. [Ā°C]

60

Data and connectivity

Direct data reading

Y

Connectors

RS232

Internal memory

N

Dedicated surface data logger

Y

Telemetry link to remote location

Y

Power

Min. operating power [V]

10

Max. operating power [V]

30

Battery

N

Additonal sensors

Standard sensor

pressure, temperature, conductivity

No. of additional sensors

6

Description of additional sensors

dissolved oxygen, optical oxygen (SST-DO), pH, Redox, H2S, current meter, turbidity, fluorescense, PAR, transmissiometer, altimeter

Documents

Brochure
datasheet-ctd90-opt.pdf
901 KB
datasheet-ctd90-opt.pdf
Other documents
  • CTD Probes (6)
    754.07 KB

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