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.

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.

A CTD is a series of small probes that can be deployed independently or incorporated into a variety of observing platforms such as remotely operated vehicles, gliders, or fixed observing buoys. On exploration vessels, a CTD is often attached to a larger metal water sampling array known as a rosette that is lowered into the water via a cable.

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.

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.

Valeport offers a selection of instruments including plug-in sensors for OEM applications, hand-held systems, devices for long term monitoring at fixed sites, and multiparameter profiling systems for deep ocean applications. All Valeport CTDs use …

The CTD (conductivity, temperature, depth) instrument is mounted to a circular frame called a rosette and can be used to gather a range of ocean properties data including salinity, density …

2025年2月3日 · Conductivity, Temperature, Depth (CTD) sensors are specialized devices used to measure the electrical conductivity, temperature, and depth of seawater. By gauging these three parameters, users of CTD profilers can infer various other properties of seawater (such as salinity and density) which are vital for understanding oceanographic processes.

2021年4月16日 · A CTD – an acronym for conductivity, temperature, and depth – is the primary instrument used to determine the essential physical properties of seawater. It provides scientists with an accurate and comprehensive representation of the distribution and variation of water temperature, salinity, and density to understand how the oceans affect life.

A CTD is so named as it measures Conductivity, Temperature and Depth. These parameters can then be used to calculate salinity and density. There are a variety of CTDs within the OOI program with unique capabilities. Some CTDs are configured with inductive communication (CTDMO), a pump to control flow through…