High precision digital meter for swimming pool water quality Product name: 3 in 1 multifunctional detection pen Type stack: 3V (CR2032 button cell) TDS test range: 0~9999PPM Conductivity test range: 0~9990US/CM Temperature test range: 0.1~80.0 Measuring accuracy: 2% Test items: TDS value test/conductivity test/temperature test Scope of application: used in water treatment industry, drinking water industry, family, personal home travel, field work, etc. as a drinking water quality testing tool. Maintenance: Keep the electrodes clean, cover the electrode protective cover, and remove the battery if it will not be used for a long time. (This product does not include batteries) Influencing factors: Water temperature: TDS pen cannot be used to measure water at high temperature; Water flow: TDS pen cannot be used to measure the water body with large shakes; Region: each region and city has different TDS values due to different pipelines and water sources Large LCD screen display: dual screen data display, simultaneous display of water quality TDS/EC conductivity and temperature value, with value retention function, easy to manage with a variety of environments. Sensitive probe, purity is immediately visible: press the switch, place the test pen in the water to be tested, the lower the TDS value, the lower the total dissolved solids content in the water The water is weaker, and the purer the water quality. / unit switching: The instrument has the function of temperature unit switching, switching between Celsius and Fahrenheit, which is convenient for different people to view the data. Packing List: 1*TDS Pen 1*Pen Case leather protection 1*instruction