CTD115M
Online and memory probe
The CTD115M is a high quality, high accuracy online and memory multi parameter probe with max. 11 sensors for oceanographic and limnological measurement of physical, chemical and optical parameters for depth up to 500 m.
Sea & Sun Technology
Trappenkamp, DE
Description
The CTD115M is a high quality, high accuracy online and memory multi parameter probe with max. 11 sensors for oceanographic and limnologic measurement of physical, chemical and optical parameters up to a depth of 500 m.
Data are stored in a standard flash memory card with a capacity limited to 128 Mbytes by the internal firmware. Up to 3 000 000 CTD data sets can be recorded on this memory. The actual number depends on the selected storage options and the number of sensors adapted to the probe.
The CTD115M allows operation in different modes:
- Continuous mode: each data set is stored.
- Time mode: data sets are stored only at programmable intervals with several selectable schemes.
- Pressure mode: data sets are stored at programmable depth stamps.
- Online mode (RS-232).
The CTD115M is equipped with a 16 channel data aquisition system with 16 bit resolution. A high long-term 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 power supply of the probe is activated by touching a reed contact with a magnetic rod, LED displays power supply status and optical control of memory access.
Standard models:
CTD115M:
Online probe for measurement of conductivity, pressure, temperature + 8 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 11 sensors
- non-corrosive titanium housing (titanium)
- depth range up to 500 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
-
Year of initial development
2012
Weight in air [kg]
9
Diameter [mm]
115
Length [mm]
680
Max. cable length [m]
500
Housing Material
Titanium
-
Observations
-
Min. depth increment [m]
0.01
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]
0.01
Uncertainty of sound velocity [m/s]
0.2
-
Operation Characteristics
-
Data display on dedicated hardware
N
Display of analogue data
Y
Method of first recording
internal /external
-
Pressure, temperature and conductivity sensor
-
Max. conductivity [S/m]
7
Resolution of conductivity [10^-3 S/m]
0.0005
Min. temperature [Ā°C]
-2
Max. temperature [Ā°C]
36
Resolution of temperature [Ā°C]
0.0005
Resolution of pressure [% FS]
0.002
Pressure sensor
Y
Type of pressure sensor
piezo resistive
Accuracy of pressure sensor
0.05
Temperature sensor
Y
Type of temperature sensor
Pt 100 4-pole
Accuracy of temperature measurement
Ā± 0.002 Ā°
Conductivity sensor
Y
Type of conductivity sensor
7-pole-cell
Accuracy of conductivity measurement
Ā± 0.002
-
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]
500
Max. pressure [bar]
50
Operating temperature: min. [Ā°C]
-10
Operating temperature: max. [Ā°C]
60
-
Data and connectivity
-
External recorder required
N
Dedicated surface data logger
Y
Dedicated sub-surface data logger
N
Internal memory
Y
Internal Memory [MB]
128
Direct data reading
Y
Connectors
RS232
Type of internal memory
non-volatile memory
Max. number of samples for self-recording [10^3]
4000000
Telemetry link to remote location
Y
-
Power
-
Battery type
Alkaline / Lithium
Min. operating power [V]
9
Max. operating power [V]
30
Battery
Y
-
Additonal sensors
-
Standard sensor
pressure, temperature, conductivity
Description of additional sensors
dissolved oxygen, optical oxygen (SST-DO), pH, Redox, fluorescense, PAR, currentmeter, turbidity, H2S, transmissiometer, altimeter
No. of additional sensors
8
