The TechPro II Series of meters provide conductivity/TDS measurements for applications such as boilers and cooling towers, reverse Osmosis, pools and spas, pulp and paper, and many other industries. The meters require only a 5-ml sample for conductivity measurements. Both the temperature-compensated measurement of interest and the sample temperature is displayed on the four-digit LCD. The meters have auto ranging function for greater resolution of your conductivity measurements between 0 and 9999 µs or 10 to 20.00 MS. Simple operation - rinse and fill cell cup and push button to display measurement waterproof ABS housing that Floats push-button calibration automatic temperature compensation to 25°c (77°f).