A
salinometer is a device that is used to determine the salinity of water. A
salinometer generally works by passing an electric current through any known
mass of water. Since salt water conducts electricity much more easily than pure
water the salinity content of water can be easily calculated.
The two RS485 lines are isolated. The isolation voltage between the two serial lines 500 V and between each isolated serial line and the backplane is up to 500V AC.
The seven-wire RS232 and two-wire RS485 use the same female RJ45 connector. Only the signal cabling is different.