Select the appropriate gas detector

Gas detector just as its name implies is used to detect the concentration of gas leakage measuring instrument, mainly is to use gas sensors to detect gas composition and content in the environment. For the production of all kinds of different occasions and testing requirements, select the appropriate gas detector is every personnel engaged in the work of safety and detection must be very attention. Below small make up to introduce on how to choose and buy the gas detector for everyone.

　　1. Confirm the types and to detect the gas concentration range:

each production unit of gas species are different. When choosing gas detector will consider all possible situation. If the methane and other DU smaller alkane, choose LEL detector is undoubtedly the most appropriate. This not only because the LEL detector principle is simple, widely used, at the same time it also has a convenient maintenance and calibration. If there are carbon monoxide, hydrogen sulfide and other gases, shall give preference to a particular gas detector can ensure the safety of the workers. If more is organic gas, considering the possible cause of DU's concentration is low, such as aromatic hydrocarbon, halogenated hydrocarbon, ammonia ( Amine) , ether, alcohol, fat, and so on, we should choose the light of the previous chapter ionization detector, and never use LEL detector to deal with, because this may lead to loss of life.

if gas species covered above a few kinds of gas, choosing a composite gas detector could reach twice the result with half the effort.

　　2. Determined using occasion:

industrial environment different, choose different types of gas detector.

) Fixed gas detection instrument:

this is in the industrial device and detector used in production. It can be installed on the specific testing point of specific gas leak detection. Fixed detector for two postures, commonly consists of sensor and transmitting test head for installation in test site, the integrated circuit, power supply and display alarm device of secondary instrument for installation in a safe place, easy to monitor. Its detection principle with former mentioned in section, just on the process and technology is more suitable for fixed testing required by the continuous and stable for a long time, etc. They also want to choose, and according to the types of the gas concentration at the same time also notice them installed in a certain gas is most likely to leak parts, such as to choose according to the proportion of the gas sensors installed the height of the most effective and so on.

b) Portable gas detector:

because portable instrument operation is convenient, small size, can carry to different production area, electrochemical detector using alkaline batteries, can be used for 1000 hours; New LEL detector, PID and compound instruments use rechargeable batteries, Some nimh or lithium ion battery has no memory) , that they can generally work almost 12 hours in a row, so, as this type of equipment in all kinds of plants and the application of the health sector is more and more widely.

if it is in the open occasions, such as the open job shop using such instruments as a security alarm, can be used to take their dispersive gas detector, continuous, real-time, because it can accurately show the scene of the concentration of gas. This kind of new instruments have equipped with vibration alarm accessories & ndash; — Heard no sound alarm to avoid in a noisy environment, and install a computer chip to record peak, STEL ( 15 minutes short-term exposure levels) And TWA ( Statistical weight average 8 hours) — — Provide specific guidance for worker health and safety.

channel or other underground pipes, underground facilities, agricultural airtight YunHuoCang granary, railway tank car, ship, tunnel, such as workplace, before the personnel to enter, it is necessary to detect, and outside confined space for testing. At this point, you have to choose more gas detector with a built-in sampling pump. Gas, choose a compound gas detector could reach twice the result with half the effort.