These three factors are the most important when purchasing a pH meter in a laboratory
A pH meter, also known as a pH meter or a pH meter, refers to an instrument used to measure the pH value of a solution. The use of a pH meter can better control the chemical reaction to achieve the purpose of improving productivity, product quality and safe production. pH meters are widely used in environmental protection, sewage treatment, scientific research, pharmaceuticals, fermentation, chemical industry, aquaculture, tap water and other fields. It can be said that almost all production departments that need water need to use pH meters.
There are many types and brands of pH meters. Sooke Purchasing Manager will talk to you today about how to choose a suitable pH meter. First of all, we need to have a general understanding of the pH meter products on the market. Here I talk about it from the aspects of product types, application scenarios, and purchase indicators:
What are the types of pH meters?
According to the application, the pH meter can be divided into pen type pH meter, portable pH meter, laboratory pH meter and industrial pH meter.
Application scenarios of pH meter
The pH meter is widely used to test the pH of purified water, tap water, domestic water and various liquids. A pH of 7.0 is neutral, below 7.0 is acidic, and above 7.0 is alkaline.
There are two installation methods of pH meter: flow-through type and immersion type. Sewage treatment plants generally use submerged installations.
How to use the pH meter
There are many types of pH meters due to different electrode designs, and their operating steps are different. Therefore, the operation of the pH meter should be carried out strictly in accordance with its instruction manual. Taking the operation of a desktop pH meter as an example, the following steps are generally required:
(1) start up
(2) Set the reading end point mode
(3) Set the temperature and select the buffer group
(4) Calibration
(5) Put the electrode into the liquid to be tested, and press the reading key to start measurement
(6) shutdown
What indicators do you need to look at when choosing a pH meter?
When purchasing a pH meter in the laboratory, there are three factors that need to be considered: first, consider the application of the pH meter, second, consider the accuracy and function required for measurement, and finally consider the quality and brand.
Depending on the application, choose whether you need a pen pH meter, a portable pH meter, a laboratory pH meter or an industrial pH meter. For example, benchtop pH meters are commonly used in laboratories, while industrial pH meters are required in fields such as wastewater treatment, electroplating, and chemical industry.
According to the measurement requirements, choose different accuracy levels. The accuracy of the pH meter is divided into 0.2, 0.1, 0.05, and 0.01. The smaller the number, the higher the accuracy.
According to the measurement needs, see if you need the functions attached to the pH meter, such as temperature compensation function (automatic/manual), whether there is an RS232 interface, whether the reading is pointer or digital display, etc.
In addition, the components of the pH meter also affect its quality and price. According to the components, they are divided into transistor type, integrated circuit type and single-chip microcomputer type. Now there are more microcomputer types on the market.
