Hanna portable conductivity meter 

HI 8733 is a splashproof multi-range range meter that measures conductivity in four different ranges for the highest accuracy possible. Measurements in each of the four rnages can be performed at the touch of a button without having to change the probe. This allows the user to easily switch applications without having to re-calibrate. Simple manual temperature compensation is acheived through a knob on the front panel.
Supplied complete with HI 76302W probe with internal temperature sensor and 1 M cable, calibration screwdriver, calibration solutions, protective case, battery and instructions.
If the temperature of the solution fluctuates, HI8733 with a built in temperature sensor and automatic temperature compensation is the right choice.
HI93300 is a portable meter that measures conductivity from 0.1 μS.cm to 200 mS/cm with just one probe.