Sea & Sun Technology - Model CTD90 -Online Multi Parameter Probe

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 (?)
• 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