Conductivity (C)

RBR CT and CTD instruments use integrated inductive conductivity sensors which measure the ability of seawater to conduct electric current.

Overview

RBR manufactures four variants of inductive conductivity cells (Fig. 8):

The three red CT cells are rugged and durable. They are not affected by surface contaminants or freezing conditions, and can be frozen into ice. RBR used computational fluid dynamics (CFD) to optimise their design. The black C cell has a simpler design which makes it easier to clean and maintain. This variant is perfect for moored applications.

The conductivity sensor is streamlined for hydrodynamic flushing through and around it, and does not require a pump, thus ensuring totally silent operation. While 80% of its volumetric measurements happen inside the cell, the measurement volume also extend up to 15cm away and thus may be affected by conductive and non-conductive objects within this distance. RBR calibrates conductivity sensors to account for static objects, such as cages, guards, and other sensors.

Conductivity measurements are temperature compensated.

Specifications