The unit uses an in-line/submersion conductivity cell Model CS650HTTC, CS675HTTC,CS676HTTC(range dependant), it utilizes a 1000 ohm platinum temperature sensor and can be used wit the afore mentioned electrodes in high temperature and /or high pressure applications It transforms the cell signal to a 4 to 20mA current proportional to the conductivity level. This output may be transmitted over two wires to a control location, the same 2 wires provide power to the transmitter. Any D.C. power supply from 12 to 36V may be used. There are two adjustments on the transmitter to standardize probes for "SPAN" and "ZERO". The output can be monitored with a loop powered meter, a loop resistor or a multimeter during the standardization procedure.