tds water quality detector tds-2 water quality tester water purification hardness skin analyzer detection of home water purity TDS水质检测仪TDS-2水质测试仪净水硬度测试笔检测家中水质纯度

Pen-type TDS instrument---(Small size, fast measurement speed with automatic temperature compensation)
This product features the following characteristics:
*Auto-shutdown — The auto-shutdown function will turn off automatically after 10 minutes;
*Well-designed – the tip electrode can be directly inserted into the water bottle mouth for measurement, and the pen cover can serve as a container for the liquid to be measured, making it extremely convenient to use;
*Rapid measurement -- thanks to the sophisticated bare-sensor component, a measurement can be completed in 2-6 seconds;
*Easy cleaning—the electrode sheath can be removed, making it convenient to clean the probe and sheath. (The probe is made of titanium.)
Primary technical parameters:
*Measurement range: 0～9990 mg/l (PPM);
*Resolution: 1 mg/L
*Accuracy: ±2% (F.S)
*Power supply: 2×3V (CR2022 battery)
*Automatic temperature compensation: It can automatically convert the reading to the value at 25°C.
*Working temperature: 0～50°C
*Environmental relative temperature: <8.5%
*Application scope: production and consumption of pure water, electrodiluted solutions, boiler water, fish tank water, water purity in swimming pools, photographic development solutions, well water, deep well water, laboratories, aquaculture, food processing, households, offices, physical and chemical teaching, ionized water for cosmetics, municipal water supply, travel health care.

The biggest selling point of this TDS pen is that its water measurement probe is made of titanium alloy. The main difference from stainless steel probes is that magnetic interference in water can affect the accuracy of water measurement, while the titanium alloy probe significantly reduces the likelihood of such interference. The case-type TDS pen is the first generation of water measurement tools. The current new generation of water measurement tools are TDS pens using this titanium alloy probe. They are also much lighter and more attractive in design, featuring a small size (only 28 grams), high measurement accuracy, and easy portability.

● Lightweight compact model → 28 grams, it is the smallest and lightest portable TDS instrument in today’s market, measuring 14.2×2.3×1.3 (CM).
● Wide measurement range → capable of measuring from 1 to 9999 PPM.
● Wide operating temperature range → Works from 0 to 50 degrees, and can be stored at -30 degrees.
● LCD Display Window → Waterproof design with large LCD screen, easy to view and durable
● Long battery life → Two CR1620 3V batteries are used, which can last over 3 years. The auto-shutdown function activates after 10 minutes of inactivity, saving battery power.
● Reasonable design → the electrode tip can be directly inserted into the tested aqueous solution for measurement, and the pen cap can also serve as a container for the aqueous solution, which is extremely convenient.
●Fast measurement → Thanks to the sophisticated bare-sensor component, a measurement can be completed in just 5 seconds.
● High accuracy → ±1% error; the titanium alloy probe offers high water measurement precision, unaffected by magnetic interference in the water.
● Automatic temperature compensation → It can automatically convert the reading to the value at 25 degrees Celsius.

TDS is the abbreviation for total dissolved solids in English. What is its Chinese translation? Dissolved solids concentration in mg/L, it indicates the amount of soluble solid substances present in 1 liter of water.
The TDS concept is an imported term that is widely used in water treatment fields in the United States and Taiwan. The tools for measuring TDS values are typically TDS pens, and their measurement principle is actually to indirectly reflect the TDS value by measuring the electrical conductivity of water. In physical terms, the more dissolved substances there are in water, the higher the TDS value becomes; the better the electrical conductivity of water, and the greater the electrical conductivity value.
In simple terms: The TDS value indicates the concentration of dissolved impurities in water. The higher the TDS value, the more impurities there are; conversely, a lower TDS value means fewer impurities.

Water temperature: The TDS pen cannot be used to measure high-temperature water bodies (e.g., hot boiled water)
Water flow rate: The TDS pen cannot be used to measure water bodies with significant movement.

Remove the pen cap and turn on the ON switch;
Place the pen in the test solution, and the height of the solution must not exceed 2 cm;
Stir the pen in the solution. After the reading stabilizes (2–6 seconds), the TDS value will appear on the screen. Press the HOLD button to lock the value.
After use, dry the water from the tip, clean it with pure water, and then put the cap back on.
Usage precautions: Avoid submerging the entire TDS pen in water, prevent direct sunlight, keep away from high temperatures, and avoid impacts, pressure, or drops.

Determine whether the quality of tap water, purified water, and mineral water meets the national drinking water standards: below 300 PPM for tap water, below 50 PPM (national standard) for pure water, and between 100–200 PPM for mineral water.