【High Accuracy】With premium quality titanium alloy probe and ACT(Automatic Temperature Compensation) function, the water quality tester reads accurately at various temperatures. 【3 in 1 Function】This TDS meter can test TDS,EC and temperature. Its measuring range of TDS is 0-9999 ppm with accuracy: ± 2%, while the EC range 0-9999 us/cm and the temp range is 32.0-212°F- 0-99.0°C with accuracy ±0.1℃. 【Auto Hold and Turn Off】The reading result will be auto-locked on LCD in seconds. To safe the power supply, the water tester will shut down automatically after 2 minutes stand by.