High precision water quality purity, 0-9990 ppm, 3 in 1, LCD digital TDS 3 Meter, TDS, EC and Temp Meter, Reverse Osmosis
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1. Digital display: Precise 4 digits. Temperature compensation accuracy 0.1<br/> 2. Backlight Function: Green backlight during TDS value ≤40, red backlight during TDS value>40<br/> 3. Auto-Lock: TDS value stable 4 seconds device automatically lock readings.<br/> 4. One-touch function: Forget to turn off the device automatically after 2 minutes.