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TDS is in English, total dissolved solids, Chinese translation for the total soluble solid, unit of measure for mg/L (mg/L), which is in 1 litre of water soluble how many mg total soluble solids.
TDS concept is an import, in the United States, Taiwan has been widely used in water treatment field, tools are usually measured in TDS TDS value, its measurement principle is, in fact, by measuring the electrical conductivity of water and indirectly reflects the TDS value.Dissolve in a physical sense, water content, the more the greater the TDS value of water, the electrical conductivity of the water is, the better, the conductivity value.
Popular speak: TDS value represents the content of solute impurities in water, the greater the TDS value, shows that the content of impurities in the water, on the other hand, the impurity content is small.
TDS pen method of use: open the TDS pen probe cover, according to the index ON/OFF button, after waiting for LCD display, measured the water, insert the TDS pen after being numerical stability, the subscript have HOLD button, take out the TDS pen read numerical may, after the test, the TDS pen probe to wipe clean with dry paper.
The influencing factors of TDS value test:
Taken the water temperature: TDS pen is used to measure high temperature water (such as: hot water)
Taken the water flow velocity: TDS pen cannot be used for measuring rock large bodies of water
U water pollution: TDS pen cannot be used to measure water pollution concentration is higher

【 features 】
1, can lock detection data;
2, can automatically shut down;
3, wide measuring range: 1-9990 PPM can measure;
4, high accuracy: the error of plus or minus 2%;
5, the product of portable small: 15.5 * 3.1 * 3.1 (cm);
6, special temperature compensation function, automatically converted to TDS under 25 ℃ temperature value;
7, large screen LCD waterproof design, convenient to watch durable;
8 and long using time without frequent replacement battery, the normal can be used for two years.


[use]
With the cap, open the switch ON;
Put the pen into the test solution, solution height shall not be more than 2 cm;
Will spend reading pen agitation in the solution, stability (10 to 30 seconds), the TDS value will be displayed on the screen, to lock the numerical, please press the HOLD key.
Dry after using written on the water, will cover the cap back once.
Use notice: to avoid the TDS pen soak into the water, avoid direct light and high temperature, to avoid the impact pressure and falls.
Product use:
Standard: check whether the water quality of the purified water mineral water is drinkable water 50 parts per million: mineral water, 100-200 PPM.
Check whether the laundry to wash clean: raw water or use water PPM, poor data not too big.
Taken the test for a qualified water: national standard 50-300 PPM.
Taken the pure alcohol: PPM value greater than 0, is not pure.
U dish washing water PPM values on the high side, shows the chemical pollution, should take note.