Choose the right gas detector

Gas detector, as its name suggests, is used to detect the concentration of gas leakage measurement instrument, mainly using gas sensors to detect the composition and content of the gas in the environment. For different production occasions and testing requirements, the choice of the appropriate gas detector is that every safety and inspection personnel must pay great attention to. The following Xiaobian on how to buy gas detector, to introduce to you.

　1.Confirm the type and concentration range of the gas to be detected:

　The types of gases encountered in each production unit are different. In choosing a gas detector, all possible conditions are taken into account. If methane and other less DU alkanes are in the majority, the LEL detector is undoubtedly the best choice. This is not only because the LEL detector is simple in principle and widely applied, but also has the characteristics of convenient maintenance and calibration. If there is carbon monoxide, hydrogen sulfide and other gases, it is necessary to select a specific gas detector to ensure the safety of workers. If more is the organic gas, taking into account its personnel may cause concentration of DU is low, such as aromatic hydrocarbons, halogenated hydrocarbons, ammonia (amine), ether, alcohol, fat and so on, photoionization detector should be the choice before the introduction, but never with the LEL detector, because it may cause casualties.

　If a gas type covers the gas above, a compound gas detector may be twice the result with half the effort.

　2.Determine the use of occasions:

　Different types of gas detectors are also available in different industrial environments.

　A)Stationary gas detector:

　This is a tester that is used more frequently in industrial installations and in the production process. It can be installed on a specific test point to detect specific gas leaks. Fixed detector is generally two type detection head sensor and transmission which is mounted on a test site, a circuit, power supply and two meter alarm device composed of an installation in a safe place, for the convenience of monitoring. The detection principle with section above, only in the process and technology is more suitable for long time continuous and stable characteristics required for fixed detection. They also should be selected according to the type and concentration of the gas field, but also pay attention to their installation in certain parts of the leakage gas most likely, for example according to the proportion of gas sensors installed on the selection of the most effective height etc..

　B)Portable gas detector:

　The portable instrument has the advantages of convenient operation, small size, can carry to the production of different parts of the electrochemical detector using the alkaline battery, 1000 hours of continuous use; the new LEL detector, PID and composite instrument using rechargeable batteries (some have no memory of the nickel hydrogen or lithium ion batteries), so that they can generally be continuous for nearly 12 hours, so, as these instruments are used in various factories and the health sector more widely.

　If it is in the open places, such as the open job shop using such instruments as security alarm, diffusion type gas can be used to wear tester, because the concentration of it can be continuous, real-time and accurately display the gas field. This type of new instrument is also equipped with some accessories to avoid vibration alarm to sound alarm sound in a noisy environment, and set up a computer chip to record the peak, STEL (15 minutes short exposure level) and TWA (8 hour statistical weight average) -- to provide specific guidance for the health and safety of workers.

　Waterways or other underground pipelines, underground facilities, agricultural closed granary, railway tanker shipping cargo, tunnels and other work situations in personnel before entering, it must be detected, and detection in closed space. At this point, it is necessary to select a multi gas detector with built-in sampling pump. Gas, the choice of a composite gas detector, may be able to achieve twice the result with half the effort.