Influencing factors:
1. Water temperature: TDS pens cannot be used to measure high-temperature water bodies (for example: hot water);
2. Water flow rate: TDS pens cannot be used to measure water bodies with large sloshing;
3. Different pipelines and water sources have different TDS values.
Maintenance: keep the electrode clean, cover the electrode protective cover, if it is not used for a long time, please take out the battery.