Xiaomi Digital LCD Display Water Quality TDS Testing Meter， 0-9990 ppm Measurement Range， +/- 2% Readout Accuracy， Automatic Temperature Compensation

What\'s the quality of your household water? Test it before drinking.
We are not able to know the purity of drinking water by merely a look. Water that seems to be crystal clear may contain many impurities. TDS value represents the Total Dissolved Solids content of the water， reflects the water quality to some extent. Generally， lower TDS value indicates less soluble salts contained in the water， and more pure water quality. Xiaomi TDS Water Quality Tester Pen can accurately detect the water TDS value. According to WHO analysis， when water TDS value is below 600， the water tastes good or appropriate; when TDS value is higher than 1000， obvious changes will happen in the taste of drinking water.

Xiaomi TDS Water Quality Tester Pen can detect three types of impurities:
·Soluble salts: Calcium， magnesium ion， etc.
·Ionic organic: Ammonium acetate， sodium， etc.
·Heavy metals: Chromium， zinc， lead， copper， etc.

Specifications
Measure Range: 0-9990 ppm
Auto shut-off: 2 minutes
Battery: 2 x AG13

Xppm ------------------- Mark
0-50 ----------------- Very Pure
50-100 ---------------- Pure
100- 300--------------- A little pure
300- 600--------------- Scale Formation
600- 1000-------------- Bad Taste
1000 and more-------- Not Suitable for Drinking

NOTE:
TDS may be affected by water temperature， flow rate， water pollution. Error in the measurement: ± 2%