TDS-3 Home Drinking Tap Water Quality Purity Tester Pen Monitor Detector, 501 Original

Specifications:Material: PlasticsSize: 142*23*13mm/5.59*0.91*0.51\\\"Product scope of use:Testing water quality of tap water, pure water and mineral water, etc.Instructions for the use of products:Take off the pen case and turn on the ON switch.Put the pen in the test solution, the solution height should not exceed 2cm.Stir the pen in the solution. After the reading is stable (2-6 seconds), the TDS value will be displayed on the screen. At this time, press the HOLD key to lock the value.After using, wipe the water on the pen head, clean it with pure water and cover it back.Factors affecting TDS value testing:Water temperature: TDS pen can not be used to measure high temperature water (e.g. hot boiling water)Water velocity: TDS pen can not be used to measure water with large swayNotes:1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!2. Please allow 1-3mm measuring deviation due to manual measurement.