Digital PH Tester

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Digital pH tester pH-220 feature: small size, portable; built-in battery, suitable for the outdoor test; high accuracy, quick response, result accuracy, and reliability.

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Hangzhou Lohand Biological Technology Co.,Ltd

Zhejiang, China

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1. What is pH?
A pH (potential of Hydrogen) measurement reveals if a solution is acidic or alkaline (also base or basic). If the solution has an equal amount of acidic and alkaline molecules, the pH is considered neutral. Very soft water is commonly acidic, while very hard water is commonly alkaline, though unusual circumstances can result in exceptions. The pH scale is logarithmic and runs from 0.0 to 14.0 with 7.0 being neutral. Readings less than 7.0 indicate acidic solutions, while higher readings indicate alkaline or base solutions. Some extreme substances can score lower than 0 or greater than 14, but most fall within the scale.
2. Does my pH electrode have to be wet?
All glass electrodes have a bulb that must be kept hydrated and a reference junction that must be kept wet to prevent excess leakage of the internal electrolyte solution from the reference junction.
3. What should I store my pH electrode in?
Ideally, the storage solution has the same chemical makeup as what is in the electrode itself, but if that is not available use buffer 4 or 7 solutions. NEVER STORE IN PURE (DISTILLED) WATER!!! In the case of electrodes that are continuously immersed, storage is not an issue since they are constantly wet.

                                                            Model No.
                                                            Pen type pH/Temp digital pH tester pH-220
                                                        
                                                            Dimension
                                                            40x185mm
                                                        
                                                            Weight
                                                            88g
                                                        
                                                            Test range
                                                            pH:0.01-14.00 pH, Temp: 0-50℃，32-122F
                                                        
                                                            Power
                                                            1.5Vx4 battery
                                                        
                                                            Resolution
                                                            pH:0.01pH,Temp:0.1 ℃， 1 F
                                                        
                                                            Working temperature
                                                            0-50℃
                                                        
                                                            Accuracy
                                                            pH:0.01pH , Temp:0.1℃，1F  pH
                                                        
                                                            Calibration
                                                            25℃ 3 points: 4.01  6.86 9.18