Sensors
Conductivity
Conductivity is the ability of water to conduct electricity. This conduction requires ions in the water to be charge carriers. Pure water contains no ions (aside from the occasional rogue water molecule), and so is a very poor conductor of electricity. But as water picks up chemical salts, those salts add ions to the water when they dissolve. So as the ionic strength of the water rises, so does conductivity - the “saltier” the water, the higher the conductivity.

Eureka offers a full line of fluorometers including chlorophyll a (blue), chlorophyll a (red), Blue-Green algae(freshwater & marine), rhodamine, optical brighteners, CDOM/FDOM, tryptophan, fluorescein dye, crude oil and refined oil. All Eureka fluorometers are based on the Turner Designs Cyclops-7 submersible fluorometer (www.turnerdesigns.com).
Ion-Selective Electrodes (ISE)
Ion-Selective Electrodes (ISE’s) are a class of sensors that respond to the presence of specific ions, such as sodium (Na+) or bromide (Br). They are used in conjunction with a reference electrode, and report ion concentrations in mg/l.
Eureka offers ammonium, nitrate, chloride, sodium, calcium and bromide.