[0.01 High-precision Hand-held Ph Meter]: Ph Measurement Range: 0-14ph, Accuracy: +/-0.01 Ph. The Ph Meter Can Tell You The Acid Base Value. Ph Has Automatic Temperature Compensation Function. [easy To Use And Calibrate]: Both The Digital Tds And The Ph Meter Have An Automatic Shutdown Function, Which Will Automatically Shut Down After 5 Minutes Of Non-use To Save Battery Life. The Tdsph Meter Can Be Turned On And Used By Pressing On/off, And It Can Be Turned Off By Pressing On/off. Press The Cal Button To Immerse The Electrode In The Liquid For Calibration. The Tds Meter Is Automatically Calibrated After It Is Turned Off. [new Function Tds]: Tds: 0-9990 Nt, Accuracy: +/-. The 3-in-1 Tds Meter Can Measure Tds, Ec And Liquid Temperature In Fahrenheit Or Celsius. Tds Is Used To Test The Quality Of The Water Purifier And Has A Backlight Function For Easy Reading. [wide Application]: Ph And Tds Thermometers Can Test The Hardness And Ph Value Of Water, Which Can Effectively Ensure The Quality And Health Of