Sea & Sun Technology - Model CTD 90M -Online Multi Parameter Probe
The CTD 90M is a high quality, high accuracy multi parameter probe for oceanographic and limnologic measurement of physical, chemical and optical parameters with up to 9 sensors and for maximum depth up to 6000 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 CTD 90M allows operation in different modes:
- Continuous mode: each data set is stored.
- Time mode: data sets are only stored at programmable intervals with several selectable schemes.
- Increment mode: data sets are stored at programmable depth increments, up to 255 files can be stored without the need for data retrieval in between.
- Online mode (RS-232).
The CTD 90M 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 model CTD 90M:
Online probe for measurement of conductivity, depth, temperature + 6 optional sensors
Included sensors:
- Conductivity (?)
- 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 on the bottom cap
- max. 6 external units
- 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