Download our guide to read the basics of CTD, select the best CTD that fits your research needs between moored CTD and profiling CTD options, and learn more about water sampling technology.

CTD stands for conductivity, temperature, and depth, and refers to a package of electronic devices used to detect how the conductivity and temperature of water changes relative to depth. The CTD is an essential tool used in all disciplines of oceanography, providing important information about physical, chemical, and even biological properties ...

A CTD instrument is an oceanography sonde (French for probe) used to measure the electrical conductivity, temperature, and pressure of seawater. The pressure is closely related to depth. Conductivity is used to determine salinity. The CTD may be incorporated into an array of Niskin bottles referred to as a carousel or rosette. The sampling ...

The SBE 911plus CTD is the primary oceanographic research tool used by the world’s leading institutions, providing 24 Hz sampling with an SBE 9plus CTD Unit and SBE 11plus V2 Deck Unit. The 911plus system provides real-time data collection over 10,000 meters of cable (single- or multi-conductor electro-mechanical sea cable, slip-ring equipped ...

A CTD — an acronym for Conductivity, Temperature, and Depth — is the primary tool for determining essential physical properties of sea water. It gives scientists a precise and comprehensive charting of the distribution and variation of water temperature, salinity, and density that helps to understand how the oceans affect life.

2025年3月10日 · The new Hybrid Ocean CTD technology offers some new features previously unavailable in the market of deep ocean conductivity sensors. The CTD can provide full ocean depth precision, using closed field technology to ensure only seawater in the conductivity cell is being measured.

The SonTek CastAway-CTD is a small, rugged and technically advanced CTD designed for profiling to depths of up to 100m. The system incorporates modern technical features which allow it to achieve a 5 Hz response time, fine spatial resolution and high accuracy.

A profiling CTD measures water parameters as it travels vertically through the water, typically lowered over the side of a ship with a winch or by hand to take measurements of a column of water.

Our rugged CTD loggers provide an all-in-one platform for easy profiling and feature durable construction for cost-effective, long-term monitoring. Expand on your CTD platform with multiparameter instruments in five- and seven-port configurations, featuring interchangeable, fast-response sensors, easy field calibration and an optional wiper to ...

The CTD (standing for "Conductivity, Temperature, and Depth") is a vital instrument when conducting scientific research on ships. Learn more about the CTD and how it functions in this video from The Hidden Ocean 2016: Chukchi Borderlands expedition.