Hach's sensION+ EC5 is a great choice if you are looking for a meter for basic conductivity monitoring. Simultaneously display conductivity, TDS or salinity along with temperature on the large, backlit LCD. Housing is a waterproof, IP-67 rated with a 6 button membrane keypad.
Other features include two point temperature readjustment and a time indicator for visual measurement.
Meter includes a general purpose conductivity probe with cable, calibration standard, carrying case, (3) AA batteries and instructions. 3 Year warranty.