The Xiaomi Mi TDS Pen water quality meter is a compact digital device designed to quickly check the purity of drinking water at home, in the office, or while traveling. This water quality meter determines whether the water contains organic compounds, heavy metals (nickel, chromium), and dissolved salts, helping you quickly decide whether additional water filtration is needed.
This water quality meter is perfect for families who want to monitor the purity of their drinking water, aquarium and pool owners, and people who use household water filters. To check the water, simply immerse the sensor tip in water for a few seconds - the display will show the accurate value. It is recommended to check the water regularly to know when it is time to change the filter.
Q: What exactly does this device measure?
The device measures the total dissolved solids (TDS) level in the water, reacting to organic compounds, heavy metals such as nickel or chromium, and dissolved salts.
Q: Can the device be used in a humid environment?
Yes, the device has an IPX6 water resistance rating, so it can be used near water without fear of accidental moisture or splashing during testing.
Question: Is it necessary to calibrate the device according to the temperature?
No, the device has automatic temperature calibration, so the measurements remain accurate regardless of the water temperature without any additional manual settings.
The Xiaomi Mi TDS Pen water quality meter is a practical and accurate tool suitable for home use, aquariums, or travel. This compact water quality meter helps you easily monitor water cleanliness every day.
Sources: Total dissolved solids (Wikipedia) | TopSmart store














| Weight | 0.060 kg |
|---|---|
| Dimensions | 5 × 1 × 1 cm |
| Brand | XIAOMI |
| Battery Included | no |
| Power Source | Other, Other |
| Communication method | Other |
| High- related chemical | none |
| Does It Includes Wireless Communication | No |
| Origin | Mainland China |
| Inbox adaptor | No |
| Wireless Communication | Non-Remote Function |
| State of Assembly | Ready-to-Go |
| Gyro | Xiaomi Professional Portable Test |
| Model Number | TDS Pen |
| Max Speed | Measuring Water Quality Purity Tester |
| Scale | 1:5 |
| Type: | TDS Tester |
| feature: | TDS-3 Test Smart Meter Digital |
| Style: | TDS Water Tester |
| Option | Yes |
| semi _ Choice | Yes |
a –
Received within 7 days of ordering. The tester seems excellent, meaning the value is repeatable and reliable. I tried closing the bypass valve of the reverse osmosis purifier a bit, and indeed the TDS dropped from 180 to 160 ppm. It’s very easy to use, but I regret that the instructions are only in Chinese.
Question: 1 pc With battery