TDS笔简介：

   TDS is the abbreviation for total dissolved solids in English, and its Chinese translation is dissolved total solids. The measurement unit is mg/L, which indicates the milligram amount of soluble solid matter in one liter of water.
The concept of TDS is a foreign import, widely used in the water treatment fields of the United States and Taiwan. The measurement tool for TDS values is generally an TDS pen, and its measurement principle is actually to measure the electrical conductivity of water to indirectly reflect the TDS value. In physical terms, the more dissolved solids in water, the larger the TDS value of the water, and the better the conductivity of the water, the larger the electrical conductivity value.
In simple terms, the TDS value represents the content of dissolved impurities in water. The higher the TDS value, the greater the content of impurities in the water, and vice versa, the smaller the content of impurities.

Factors affecting the TDS value test:

Water temperature: The TDS pen is not suitable for measuring high-temperature water (e.g., boiling water).
The flow rate of water: A TDS pen cannot be used to measure water with significant agitation.

Product Usage Instructions:

Remove the pen cap and turn on the ON switch.
Insert the pen into the test solution, and the height of the solution should not exceed 2cm.
Stir the pen in the solution, and after the reading stabilizes (2-6 seconds), the TDS value will be displayed on the screen. At this time, press the HOLD button to lock the value.
After use, wipe the water off the tip of the pen, clean it with pure water, and then cover the pen cap back on.
Use caution: Avoid immersing the TDS pen completely in water, avoid direct sunlight, stay away from high temperatures, and avoid impact, pressure, and falling.

Product Usage Range:

To detect the quality of tap water, pure water, and mineral water to see if they meet the national drinking water standards: tap water should be below 300 PPM, pure water should be below 50 PPM (national standards), and mineral water should be between 100-200 PPM.

The specifications and parameters of the test pen are as follows:

● Compact and Pocket-sized → Weighs 28 grams, the smallest and lightest portable TDS instrument on the market today, measures 14.2cm long by 2.3cm wide by 1.3cm thick.
● Measurement Range → Can measure 1-9990 PPM (display above 999 PPM, the value is X10).
● Wide operating temperature range → Operates at 0-50°C, storage at -30°C.
● LCD display window → large-screen LCD display with waterproof design, convenient for viewing, durable and long-lasting
● Long battery life → Uses 2 pieces of CR1620 3V batteries, which can last over 3 years. The device will automatically turn off after 10 minutes of inactivity to save battery power.
● Reasonable design → The pen-tip electrode can be directly inserted into the measured aqueous solution for measurement, and the pen casing can also be used as a container for the measured aqueous solution, which is extremely convenient.
● Measurement speed → Due to the delicate and bare sensor element, it can complete a measurement in 5 seconds.
● High accuracy → ±1% error, titanium alloy probe for measuring water has high precision and is immune to magnetic interference in water.
● Automatic temperature compensation → can automatically convert the display value to the value at 25 degrees.