Gas Detector Selection Method

The type of gas encountered in each production department is different. All possible situations should be considered when selecting a gas detector. If methane and other less toxic alkanes are the most common, the LEL detector is the most suitable. This is not only because the LEL detector has a simple principle and a wide application, but it also has the characteristics of convenient maintenance and calibration. If there are toxic gases such as carbon monoxide and hydrogen sulfide, it is necessary to select a specific gas detector to ensure the safety of workers. If there are more organic toxic and harmful gases, considering the lower concentration of people who may cause poisoning, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amines), ethers, alcohols, fats, etc., you should choose the light introduced in the previous chapter. Ionize the detector and never use the LEL detector, as this can result in personal injury or death.

If the gas type covers the above types of gases, choosing a compound gas detector may achieve a multiplier effect.

There are different types of gas detectors in different industrial environments. The instruments are mainly divided into three categories: fixed gas detectors, portable gas detectors and hybrid gas detectors.

1. Fixed gas detector

This is the use of more detectors on industrial plants and in production processes. It can be installed at a specific inspection point to detect specific gas leaks. Stationary gas detectors are also selected according to the type and concentration of the gas in the field, and care should be taken to install them where the specific gas is most likely to leak, such as selecting the most effective height for sensor installation based on the specific gravity of the gas.

2. Portable gas detector

Because the portable instrument is easy to operate and small in size, it can be carried to different production sites. The power supply mode is generally powered by a rechargeable lithium battery or a high-energy battery, so that they can work continuously for nearly 7 days, and the high-energy battery can be used for nearly half a year. Therefore, as such instruments are increasingly used in various factories and health departments.

If it is open, such as an open work shop using such instruments as a safety alarm, you can use a diffused gas detector that you wear, because it can display the concentration of toxic and harmful gases in the field continuously, in real time and accurately. Some of these new instruments are also equipped with vibration alarm accessories – to avoid audible alarms in noisy environments and provide specific guidance for workers' health and safety.

If it is entering a confined space, such as a reaction tank, storage tank or container, sewer or other underground pipeline, underground facilities, agricultural closed granary, railway tanker, shipping cargo bay, tunnel, etc., it must be tested before personnel enters. And to test outside the confined space. In this case, you must select a multi-gas detector with a built-in sampling pump. If there are multiple gases in the environment, choosing a hybrid gas detector can achieve twice the result with half the effort.

3. Composite gas detector

The multi-gas detector can be equipped with multiple gas detection sensors on one instrument, so it has the characteristics of small size, light weight, fast response and multi-gas concentration display. More importantly, the price of the Yiyang compound multi-gas detector is cheaper than that of multiple single-diffusion gas detectors, and it is more convenient to use. It should be noted that when selecting such detectors, it is best to select instruments with individual sensor functions to individually switch to prevent other sensor usage from being affected by one sensor.

The above is the knowledge of the gas detector provided by China coal, I hope to help you.

China coal is a high-tech enterprise specializing in the design, research and development, production, sales and service of flammable, toxic and harmful gas detection, and providing professional solutions. It mainly includes flammable gas detector alarms and fixed gas detectors. Toxic and harmful gas detector alarm, portable fixed gas detector, toxic and harmful gas detector, etc.