DST CTD is the smallest salinity logger on the market that measures and records conductivity (salinity), temperature and pressure (depth). Recorded data is stored in the logger‘s internal memory with a real-time clock reference for each measurement. The DST CTD is supported by the SeaStar software and the Communication Box which serves as an interface between the logger and a PC. Communication between the logger and the Communication Box is wireless. In SeaStar, the user sets the start time, start date and sampling interval before starting the recorder. Up to seven different intervals can be set for the same measurement sequence. This is especially useful when more frequent measurements are needed at a certain time period. One interval for the whole measurement sequence is more commonly used though.