Fangrui Product Details Multi-functional Design: Combining Ph/ec/tds/salinity And Temperature Measurement Functions. Immersed The Electrode Of The Tester In Water And Waited For A Few Seconds To Get The Data On The Lcd Screen. One Machine Is Multi-purpose, More Economical And Environmentally Friendly. Automatic Temperature Compensation: According To The Nernst Equation, When The Probe Is Inserted Into The Water From The Air, There Be Errors In The Measured Data Due To The Temperature Change, Automatic Temperature Compensation Automatically Calibrates The Errors And Maintains The Accuracy Of The Data. Automatic Temperature Compensation Range: 0.1- 60 32f-140f Lock Button: After The Value Is Stable, Click The Hold Button To Lock The Current Value. If You Need To Re-measure, Please The Hold Button Again. Multi-functional Detachable Probe: High-precision Probe With High-precision Algorithm Chip Ensures More Accurate And Faster Response Of The Tester. The Detachable Probe Design Is Convenient To Carry And Store, Easy To Rep