1. LCD large screen display with backlight, easy to cope with a variety of environments
2. Celsius and Fahrenheit units switch
3. Automatic temperature compensation
4. Switch between TDS and conductivity
5. Can be used: for water treatment industry, drinking water industry, family, personal home travel, field work, etc. as a drinking water quality inspection tool

Parameters.
1. TDS test range: 0-9999PPM
2. Conductivity test range: 0-9990US/CM
3. Temperature range: 0.1-80 degrees Celsius
4. Measurement accuracy: +/-2%
5. Battery type: CR2032 button cell
6. Weight: 43 grams
7. Size: 153 x 30 x 14mm

Influencing factors.
-Water temperature: TDS pen can not be used to measure high temperature water (such as hot boiling water)
-Water flow rate: can not be used to measure a large body of water shaking
-Region: Each region, city due to different pipelines and water sources, TDS value is different