Fangrui Product Details The Ph Meter Has A 3-in-1 Function That Simultaneously Measures Ph, Tds And Temperature With High Accuracy. With Just One Water Tester, You Can Easily Monitor Multiple Important Parameters In Your Water. The Drinking Water Ph Tester Comes With A High-sensitivity Probe, You Can Read The Results Quickly, With A Measurement Range Of 0-14.0. High Accuracy With A Resolution Of 0.01. The Ph Meter Provides Precise Ph Readings, Ensuring You Get Accurate Information About The Ph Levels In Your Water. The Digital Ph Meter Has An Automatic Calibration Function And Is Equipped With Ph Calibration Powder Ph 4.00 / Ph 6.86 / Ph 9.18. Just The Automatic Calibration Button And The Water Ph Meter Automatically Identify The Calibration Solution. Automatic Calibration Ensures Accurate And Consistent Readings Every Time. The Ph Meter Has An Automatic Temperature Compensation Function That Can Be Adjusted According To Water Temperature And Quality. The Water Meter Can Accurately Determine The Ph Of A Sample From 32f-140f