Sea & Sun Technology CTD48
$ 0,00
The CTD48 is a high quality, high accuracy 4 channel online probe for oceanographic and limnological measurement of conductivity, temperature, depth and one optional parameter for depth up to 6000 m.
Standard models:
CTD48:
Online probe for measurement of conductivity, pressure, temperature + 1 optional sensor
Standard sensors:
Conductivity (С)
Temperature (T)
Pressure (D)
Additional sensors:
Dissolved Oxygen
Turbidity
pH
Redox (OPR)
Description
The CTD48 is a very small and handy microprocessor controlled multiparameter probe for precise online measurements of pressure, temperature, conductivity and one optional parameter.
The probe is especially designed for limnological measurements on lakes, rivers and estuaries but can be used also in shallow water and in the oceanographic range up to 6000 m depth.
The CTD48 is equipped with a 4 channel data acquisition system with internal 20 bit resolution. Data output is 16 bit. A high long-term stability and automatic self-calibration of the analogue digital converter guarantees stable and precise CTD measurements for many years.
The CTD48 is equipped with several interfaces:
- RS-232
- RS-485
- FSK.
The RS-232 port can be used with multi-conductor cable up to distances of several hundred meters. The user can operate the probe easily from small boats and ships. The serial data will be applied directly to the serial port of a PC. Power has to be provided externally e.g. by a 12V battery or a regulated power supply.
RS-485 is used for data transfer in areas with high environmental electromagnetic noise, a safe data transmission requires cable with twisted pairs. RS-485 interface can drive up to 1000 m cable length on nearly any cable. The RS-485 signals need to be converted into RS-232 before being acquired by a PC.
FSK transmission is used mainly on single-conductor cables. Data is modulated on the power supply rail for a long distance data transmission. FSK operation requires a special power supply interface with a demodulator unit that converts the FSK data into RS-232 or USB 2.0 format.
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.
Standard models:
CTD48:
Online probe for measurement of conductivity, pressure, temperature + 1 optional sensor
Standard sensors:
- Conductivity (С)
- Temperature (T)
- Pressure (D)
Additional sensors:
- Dissolved Oxygen
- Turbidity
- pH
- Redox (OPR)
Calculated parameters:
- salinity
- sound velocity
- Kappa 25 mS/cm
- sigma
Main Features:
- low weight
- easy handling
- up to 4 sensors on the bottom cap
- non-corrosive titanium housing
- depth range up to 6000 m
- SDA data acquisition software running under various versions of Microsoft Windows (a part of the shipment)
- calculations according to UNESCO formulae
Additional information
| Weight in air [kg] | 1.2 |
|---|---|
| Direct data reading | Y |
| 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 |
| Description of additional sensors | dissolved oxygen, pH, ORP, turbidity, H2S |
| No. of additional sensors | 1 |
| External recorder required | N |
| Dedicated surface data logger | N |
| Dedicated sub-surface data logger | N |
| Connectors | RS232 |
| Min. time increment [s] | 0.2 |
| Internal memory | N |
| 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 |
| Resolution of salinity [psu] | 0.001 |
| Min. depth increment [m] | 0.01 |
| Diameter [mm] | 48 |
| Resolution of conductivity [10^-3 S/m] | 0.0001 |
| Length [mm] | 450 |
| Max. cable length [m] | 6000 |
| Housing Material | Titanium |
| Min. operating power [V] | 9 |
| 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 |
| Max. conductivity [S/m] | 70 |
| Min. temperature [°C] | -2 |
| Uncertainty of pressure [% FS] | 130 |
| Max. temperature [°C] | 36 |
| Resolution of temperature [°C] | 0.0005 |
| Resolution of pressure [% FS] | 0.002 |
| Pressure sensor | Y |
| Type of pressure sensor | piezo resistive |
| Accuracy of pressure sensor | up to 0.05 % |
| Temperature sensor | Y |
| Type of temperature sensor | Pt 100 4-pole |
| Accuracy of temperature measurement | 0.002 |
| Conductivity sensor | Y |
| Type of conductivity sensor | 7-pole-cell |
| Accuracy of conductivity measurement | ± 0.002 |
| Addres | Sea & Sun Technology Arndtstrasse 9-13 24610 Trappenkamp Germany |
