Apera Instruments Premium Series EC60 Pocket Tester tests conductivity/TDS/salinity of general water solutions in a reliable and easy manner. The applications include hydroponics, tap/drinking water, pools& spas, education, water treatment, environmental monitoring, etc. Up to 3 points of auto. calibration and 0 to 50?C Auto. Temperature Compensation (ATC), 1% F. S, 0. 5?C accuracy in a range of 0-20. 00 mS/cm (20, 000 µS/cm), 0-50. 0?C. Apera's unique platinum black sensor adopts a special processing technology, which minimizes electrode polarization, expands measuring range, and increases firmness of the electrode, hence ensuring a much higher accuracy and consistency in a wide-range conductivity measurement compared to traditional stainless steel electrodes. The probe is replaceable and easy to install so that you don?t have to buy a whole new meter once the probe retires. Auto. recognition and indication of stable values improves consistency, saving you the trouble of guessing when to manually hold measurement. With a large LCD screen with 2 backlight colors (blue for measurement, green for calibration), it supports dual display of temp. /EC value and indicators of successful calibrations and stable readings. Easy parameter settings, customizing your tester functions according to your needs (switch of temperature unit, TDS factor setting, switch of salinity unit, auto. hold on/off). Smart self-diagnosis, warning of out-of-range/preset measurement and incorrect calibrations. Comes with a complete kit. IP67 water-resistant, 1000 hours' continuous operation powered by AAA batteries (with low power warning and auto power off in 8 min if no operation). The product is CE and RoHS certified, and is manufactured under an ISO 9001: 2015 certified quality system.