👉 The CTD (Conductivity, Temperature, Depth) fluid is a crucial component in oceanographic research, used to measure and record the electrical conductivity, temperature, and depth of seawater as a researcher descends through the water column. Conductivity is measured by the fluid's ability to conduct an electric current, which correlates with salinity; temperature readings are taken using thermistors, and depth is inferred from pressure sensors. These measurements provide detailed vertical profiles of ocean properties, essential for understanding ocean dynamics, climate patterns, and marine ecosystems.
