3 Pcs/lot Pen Design TDS+LED Digital Meter TDS TEMP PPM Tester Pen Stick Water Purity Monitor Portable

3 Pcs/lot Pen Design TDS+LED Digital Meter TDS TEMP PPM Tester Pen Stick Water Purity Monitor Portable
sku: 404336219
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$6.29
Shipping from: China
   Description
TDS(TOtal Dissolved Solid)means that the total amount of dissolved solids in water is the total number of inorganic salts and organic matter. The unit of TDS pen is PPM (mg/L), and the higher the TDS value is, the more solute it contains in water
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