Learning about conductance

Specific Conductance (SC) is a measure of how well water can conduct an electrical current. Conductivity increases with increasing amount and mobility of ions.

SC is usually reported in microsiemens (1/1,000,000 siemen) per centimeter, or µS/cm. SC is affected by temperature, so for consistency SC values are converted to what they would be at room temperature (25° C).



How can we measure this in the ocean. Well there are many "probes" that you can buy, or it is possible to make a probe using a few electronic chips and a microcontroller.
A microcontroller is essentially a small computer, and I personally like the open source arduino.
There is a very active group of hobbyists, scientists, artists, and very clever people using the arduino.