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 (С)
- 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
Additional information
| Weight in air [kg] | 6 |
|---|---|
| Internal memory | N |
| 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 |
| 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 |
| Direct data reading | Y |
| Connectors | RS232 |
| Dedicated surface data logger | Y |
| Min. depth increment [m] | 0.1 |
| Telemetry link to remote location | Y |
| 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 |
| Data display on dedicated hardware | N |
| Method of first recording | external |
| Display of analogue data | Y |
| Brand | Sea & Sun Technology |
| Min. time increment [s] | 0.2 |
| Uncertainty of pressure [% FS] | 130 |
| Diameter [mm] | 90 |
| Type of pressure sensor | piezo resistive |
| Length [mm] | 600 |
| Housing Material | Titanium |
| Max. cable length [m] | 6000 |
| Min. operating power [V] | 10 |
| Max. operating power [V] | 30 |
| Battery | N |
| Max. depth [m] | 6000 |
| Max. pressure [bar] | 600 |
| Operating temperature: min. [°C] | -10 |
| Operating temperature: max. [°C] | 60 |
| Pressure sensor | Y |
| Resolution of pressure [% FS] | 0.002 |
| Accuracy of conductivity measurement | ± 0.002 |
| Accuracy of pressure sensor | up to 0.05 |
| Temperature sensor | Y |
| Type of temperature sensor | Pt 100 4-pole |
| Min. temperature [°C] | -2 |
| Max. temperature [°C] | 36 |
| Resolution of temperature [°C] | 0.0005 |
| Accuracy of temperature measurement | ± 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 |
| Addres | Sea & Sun Technology Arndtstrasse 9-13 24610 Trappenkamp Germany |
