The Sentek Easy Ag uses an SDI12 output. 

Wiring Variations

Sentek EasyAg uses three many different variations of wiring colors for their probes, due to the probe cable being sourced in some cases from a 3rd party.

See below for known variants.

If the cable colors you encounter are not listed below, you can determine the correct colors by the order of the wires entering the terminal block connector.

Position	Function	Pinout for all "S" cable loggers
Right	Signal/SDI12	Pin 2
Middle	Ground	Pin 4
Left	Power	Pin 1

 Variant #1

Variant #2

Variant #3 

Variant #4