Why does the TDS value remain unchanged for the first 30 seconds on the Xiaomi Home App for the Mijia Smart Water Purifier N800G?

Question

Accepted Answer

The Mijia Smart Water Purifier N800G utilizes RO (reverse osmosis) technology to purify water. After the purifier stops, a small amount of water remains in the system, causing a brief temporary increase in TDS.
When the purified water tap is opened, the Xiaomi Home App initially displays the TDS value from the previous operation for approximately 30 seconds. This brief display delay occurs because the App is showing the last recorded reading while the real-time measurement stabilizes. After about 30 seconds of water flow, the App updates to show the real-time TDS value.
It is important to note that TDS measures only dissolved solids in the water and does not indicate the presence of bacteria, viruses, or other harmful substances. Therefore, the initial TDS display does not compromise water safety or drinking quality, and the purifier continues to provide safe, high-quality purified water throughout use.