Salinity, Conductivity, Temperature and Depth Logger

Small and economical salinity logger. Easy to mount on gear. Wide salinity range. Long battery life.

For use on subsea gear and moorings for long-term oceanographic studies. Adding Star-Oddi’s protective housing offers flexible mounting options and added protection.

Key features

  • Smallest CTD salinity logger on the market
  • Easy to mount on gear
  • Wide salinity range, low to high conductivity
  • Long battery life - up to 5 years
  • Depth sensors for shallow to deep ocean
  • Description

    Smallest CTD on the market

    This small autonomous salinity probe DST CTD measures and records conductivity, temperature and pressure. In addition to the three measured parameters the software calculates and displays salinity values and velocity in graphical and tabular form upon data conversion. It is only 50 mm in length and 15 mm in diameter. Due to its small size it is easy to mount it on various gear and nets.


    DST CTD is small and economical when compared to bulkier CTDs on the market. The CTD salinity measuring device is used for a variety of studies including:

    • Oceanography and hydrography - long term stationary monitoring or surveying. CT version availalble
    • Fisheries research - CTD attached to fishing gear
    • Data collection on underwater vehicles – small sized CTD is an advantage. Online version available
    • For using the CTD on fish and marine animals, click here

    Easy to mount on gear with protective housing

    A plastic protective housing is available, recommended when fastening the logger to subsea gear and moorings. Whilst protecting the logger it also gives flexible mounting options, with attachment points at the top and bottom. A wire clip is also available for ease of fastening to the research subject

    Wide salinity range, low to high conductivity

    The DST CTD can capture conductivity from 3 to 68 mS/cm. Low conductivity range, 0.1-6 mS/cm, is also available, ideal for measuring in brackish water.

    Long battery life - up to 5 years

    Measuring at 10 minute interval, the logger can last up to 5 years.

    Depth sensors for shallow to deep ocean

    Customers choose between depth calibration ranges up to 100 m, 500 m, 1200 m or 2400 m. The shallower the range the better the depth resolution and accuracy.

    Minimise risk of biofouling with a copper grid device

    The copper grid is recommended for use with the DST CT and CTD when the logger is being left unattended for a month or longer. The copper grid minimizes the risk of biofouling on the conductivity cells. It is inserted into the plastic protective housing, filtering the water entrance holes.