Precision conductivity sensors for demanding applications

Conductivity measurement is essential in water treatment, industrial processes, and medical diagnostics. Backed by Swiss engineering and extensive customization options, iST delivers reliable solutions for complex measurement challenges.

Unlike solid conductors, where current is carried by electrons, electrical conduction in liquids occurs through the movement of dissolved ions. Conductivity is determined using a cell constant, which links the measured resistance to the actual conductivity of the medium. This constant depends on sensor geometry, electrode arrangement, frequency, and the measurement environment.

iST conductivity sensors are carefully characterized over defined frequency ranges to ensure stable and accurate operation. Both two‑electrode designs for low‑conductivity media and four‑electrode geometries for higher conductivities are available, each optimized for precision and reliability. Temperature effects, which significantly influence ion mobility, can be compensated with integrated temperature sensors to further improve measurement accuracy.

Broad application possibilities

iST conductivity sensors are used in a wide range of industries, including water treatment, pure water monitoring, industrial process monitoring, marine and environmental sensing, and medical devices such as dialysis and laboratory analysis systems. Depending on the conductivity range and installation conditions, customers can select or customize sensor elements to match their exact requirements.

With flexible design options, robust materials, and strong application expertise, iST delivers conductivity sensors that integrate seamlessly into customer systems—ensuring dependable measurements wherever liquids matter most.

Partner with iST for your next sensor solution—built on our application know‑how and configurable designs—so you can bring robust, accurate liquid conductivity sensing to market faster.