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.
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
-
CTD Probes (6)754.07 KB