In general, pure water quality is judged by conductivity, while ultra pure water quality is measured by resistivity. Simply speaking: pure water is based on the amount of medium in water to reflect the conductivity of medium to monitor water quality, while the medium in ultra pure water is not only non-conductive, but also has enough resistance and higher purity. The calculation formula of conductivity is as follows: X is the conductivity, f is the Faraday constant, CI is the concentration of certain ions, Zi is the charge number of ions, UI is the ion mobility, the formula is: x = f ∑ ciziui theoretically, the conductivity of ultrapure water without ions in Jiangmen drinking water machine is 0.055 μ s / cm at 25 ℃. The resistance is the reciprocal of the conductivity. Then r = 1 / x, 1 / 0.055 = 18.1818 is about 18.2 m Ω. Cm. Generally, we can not accurately measure the resistivity or conductivity of ultrapure water off-line. When ultra pure water is exposed to the external environment, it will be polluted by the external environment. The air in the laboratory contains a large number of ions, which can enter into ultra pure water, thus affecting the quality of ultra pure water. In addition, the instruments used to measure conductivity (beaker, resistivity meter / probe) will also bring in ionic pollutants. As shown in the calculation formula of conductivity, the increase of any ion will affect the conductivity value, because the type of conductivity ion is directly proportional to its charge.
Therefore, the water quality monitoring of ultrapure water is on-line monitoring, and the data obtained by Shenzhen Shijun ultrapure water machine when it is working is correct. In other words, it is only when the machine is working and ultrapure water is active that the resistivity of water can be measured correctly. It is not accurate when it is still, or when the flow is small or the activity is insufficient.
Article source: Jiangmen water dispenserhttp://www.jmhz-union.com
04-06
Development history of boiling water machine
The internal structure of the first generation of boiling water machine is simple, which can be divided into: box (for water storage and boiling), floating ball (for water level control) and heating pipe (for heating). In the process of using, people find that there is only one water tank, which can't separate raw water from boiled water; there is only one floating ball as the water level control, which can't control the raw water into the water tank when people take water. At the same time, bec
04-06
Precautions for use of drinking water equipment in factory
When it comes to factories, we know the place too well, because we are the place where we work, work and live. Everything is closely related to us. The factory water dispenser is an indispensable part of our working life. As for the use and maintenance of the factory water dispenser, I don't think everyone is clear. Let the experts of direct drinking water tell us how to maintain the factory water dispenser. 1. Handle the water dispenser with care. When moving the water dispenser in the factory,
04-06
Suggestions on daily life of Jiangmen drinking water equipment manufacturers
1. About diet 1. Stay away from tobacco and alcohol 2. Pay attention to breakfast 3. Eat 7 minutes full 4. Eat more vegetables and grains 5. Drink less carbonated drinks 6. Drink more water 7. Eat less leftovers to reduce cancer risk 8. Eat more lean meat and less salt 2. About sports 1. Enjoy more sunshine at 8 a.m. 2 Exercise for half an hour every day 3. Walk or jog after meals 4. Rest for half an hour after exercise and then take a bath 5. Plan to travel once a year 3. About days 1. Go to be
04-06
How to choose a commercial water dispenser?
Function 1: direct drinking device commercial direct drinking machine can not only improve the water quality, but also make our life more convenient. Tap water that can be drunk directly can not only save time, but also taste sweeter. Let us no longer need to spend time boiling water and then cool, and do not have to endure the light taste of boiling water after cooling. So now many people in the choice of commercial drinking water machine time, will choose to have a direct function of drinking