What Are The Water Quality Classifications

- Mar 27, 2020-

Water quality testing method



For the worsening water pollution problem, the method adopted by the water plant is to add a large amount of chlorine (bleach powder) to sterilize. Although chlorine can kill various germs in water, once it is combined with organic matter in water, it will produce a large amount of organic chlorides (such as chloroform, dibromochloromethane) due to the effect of residual chlorine or bleaching powder, which is harmful to human health . Organic chlorides have been identified as carcinogens in tests in animal systems. Most people think that they can kill bacteria just by boiling the tap water, but they must be boiled for 20 minutes to remove harmful bacteria or viruses. During the boiling process, the chlorine gas in the water will intensify the combination with organic matter, and a large amount of carcinogens such as trihalomethane will be formed, especially at 100 ° C. To remove chlorine gas, boil for more than 30 minutes, and open the lid of the pot to allow the chlorine gas to volatilize with the steam. Otherwise, the trihalomethanes synthesized by chlorine gas will still remain in the water and chronically endanger health.




The conductivity of water has a certain relationship with the amount of inorganic acids, alkalis and salts it contains. When their concentration is low, the conductivity increases with increasing concentration. Therefore, this indicator is often used to estimate the total concentration or salt content of ions in water. Different types of water have different electrical conductivity. The conductivity of fresh distilled water is 0.2-2μS / cm, but after standing for a while, it increases to 2-4μS / cm due to absorption of CO2; the conductivity of ultrapure water is less than 0.10 / μS / cm; the conductivity of natural water is much Between 50-500 μS / cm, mineralized water can reach 500-1000 μS / cm; the conductivity of industrial wastewater containing acids, alkalis and salts often exceeds 10 000 μS / cm; the conductivity of seawater is about 30 000 μS / cm. Electrical conductivity is an important indicator for measuring the purity of pure water, which reflects the purity of pure water and the control of the production process. National standards stipulate that the conductivity of purified water should not be higher than 10 μS / cm.

What IS TDS?

Total Dissolved Solids(TDS) are the total amount of mobile charged ions,including salts or metals dissolved in a given volume of water. TDS,which is based on conductivity,is expressed in parts per million(ppm) or milligrams per liter(mg/L).TDS includes any inorganic element present other than the pure water molecule(H2O) and suspended solids.


The higher the TDS level in water, the greater the of probability of harmful contaminants that can pose health risks or hinder the absorption of water.

The U.S. EPA’s Maximum Contaminant Level of TDS tds checking tester  for human consumption is 500 ppm.


Use the TDS Meter to:

Check the performance of your water filter

Check for the hardness (1 grain=17ppm)

Make sure you always drink pure water.



TDS / EC /  ℉ / ℃  METER



Water quality analyzer

tds meter water quality

Measuring range

TDS: 0-9990ppm (mg/L)

EC:0-9990 us / cm

Temp: 0-99   or 32-212


TDS: ±2%(F.S) 

EC:  ±2%(F.S) 

Temp:  ± 1 ℃

Auto Shut off

10 minutes





Operating Temperature


Power supply

 2*1.5V ( CR1620)


1 TDS meter 

 2 batteries (included) 

 1 manual

Applied range

TDS meter is a easy tool for testing the level of water quality, popular in water deal industry, household, travlling, and etc.

Usage Situation

TDS meter is a easy tool for testing the level of water quality, popular in water deal industry, household, travlling, and etc.

Test Item

Heavy metals, turbidity, total hardness, dissolved oxygen, TDS