How to choose a gas analyzer?

A gas analyzer is an industrial process control instrument. In the industrial production process, especially in the production process with chemical reactions, such as various chemical plants, pharmaceutical industry, air separation industry, iron and steel smelting, coal chemical industry, etc., it is widely used and plays a role in guiding process production.

Therefore, the selection of gas analysis instruments (systems) is very important, and some companies are negligent or cheap when selecting models, which may cause problems in the selection. In light cases, the instrument cannot be used normally or the maintenance workload is heavy, and in heavy cases, it will lead to hidden dangers in production safety. Due to the different working conditions and different production environments of various manufacturers, there are many types of gases analyzed and detected. Different gases need to be selected according to the actual working conditions and actual needs to provide customers with solutions.

Biogas analyzer selection skills

1. Determine the working parameters of the use site

First analyze the use form of the instrument plan (portable, online), whether to consider explosion-proof, gas composition (one or more), pressure, flow, approximate range of content, temperature and humidity, whether there is water vapor, whether there is dust, The presence of corrosive gases such as acid and alkali will affect the final analysis and test results.

Secondly, for signal output, current output, alarm upper and lower limits, whether network interface is required, whether wireless transmission is required, whether switching output is required, etc., it is also necessary to communicate with the manufacturer one by one.

Therefore, it is necessary to provide real working conditions and parameters with the gas analyzer manufacturer. With these basic conditions, the gas analyzer manufacturer can make a preliminary selection based on these working conditions parameters.

The lack of any of the above process parameters may cause problems in the selection of analytical instruments and fail to meet the requirements for use. Either the detection data is inaccurate, or various problems occur frequently after use, resulting in a large amount of later maintenance. Therefore, it is necessary to know the process parameters of the monitoring point when selecting the type. These are the necessary working condition parameters for the type selection.

2. Stability and applicability of the preprocessing unit

When the parameters of the gas to be measured do not meet the detection conditions of the gas analyzer, pretreatment (measures such as cooling, depressurization, anticorrosion, dust removal, etc.) is required. The pretreatment unit of the gas analyzer is a key component of the gas analysis system. One of them is no less critical than the analytical instrument itself.

Why is the preprocessing system so important? Because the gas analyzer is a precision instrument, its operating conditions are relatively harsh. The temperature, humidity, flow rate, pressure, etc. of the gas to be measured must meet the analysis conditions before testing. Otherwise, the detected results will lose their guiding significance if they fail to meet the requirements.

However, the environment in which the gas analyzer is used is mostly a chemical environment with relatively harsh working conditions. Therefore, the gas analyzer and each pretreatment component used in the pretreatment unit must be very reliable. In the case of considering the parameters of the process medium, redundant design should be considered, so as to ensure the good operation of the analyzer. Otherwise, under harsh detection conditions, the sensor of the gas analyzer is prone to damage or other problems.

3. R&D, production and after-sales capabilities of instrument manufacturers

As the saying goes, "I'm not afraid of encountering problems, but I'm afraid that the problems will not be solved properly." Whether it is an imported gas analyzer or a domestic gas analyzer, manufacturers can't guarantee that their products will not be used in the process. any problem occurs. But in the event of a problem, the manufacturer's response time and after-sales attitude are very important.

The loss of one day’s production line parking is sky-high. If you choose an intermediary unit to buy the instrument, you can only use the customer>dealer>manufacturer after the instrument has a problem. You need to go through layers of contact to find the manufacturer. of technicians. If it is purchased directly from the manufacturer, the above situation will be greatly avoided.

When purchasing, whether it is a middleman or a manufacturer, it must be agreed in the purchasing contract on relevant training, installation, how to solve problems, and on-site resolution time when problems occur, so as to avoid wrangling on after-sales issues.

Therefore, customers must choose a powerful manufacturer and agency when selecting models, so as to ensure that the analyzer can be properly resolved when encountering problems during use, spare parts, timely after-sales, product technical performance, stability, etc. One of the deciding factors in purchasing.

4. Investigation on the use of enterprises under the same working conditions

If it is a small number of single analytical instruments, the on-site inspection can be omitted. If it is a large-scale complete gas analysis system and the quantity is large, the purchasing company can conduct on-the-spot investigation appropriately.

For example, go to the intentional procurement production enterprise for on-the-spot inspection, check the production management situation, company scale, technical strength, etc. of the enterprise, and obtain first-hand information through the on-site inspection. You can also contact a similar or similar manufacturer to use the unit for inspection to see which gas analyzer the other party uses, how it is used, how the price is, and whether the after-sales service is in place.

Through on-site inspections, the most real and accurate information can also be obtained, which is also helpful for the final selection.

Having said so much, the ultimate purpose is to tell everyone that when choosing a gas analysis instrument, you must see the essence clearly, and specific problems need to be solved in detail. It is the best to choose the process that is suitable for your own working conditions. It is not necessary to import The most important thing is to choose the one suitable for the process conditions. In the process of use, strengthen the training and learning of the users, increase the understanding of the product, and truly make the analytical instrument serve the production process.