Clear inspection regulations
The first step in selecting a gas detector is to determine what gas to detect? In what environment? Portable or fixed? And other additional functions, these elements are usually considered.
▶▶▶ Confined space: for example, reaction tanks, sewer pipes or other underground pipelines, underground facilities, tunnels and other work places, inspection should be done before the staff enter, and inspection should be done outside the confined space. At this time, it is necessary to select a multi-gas detector equipped with a built-in sampling pump. Because the gas distribution and gas types in different areas (upper, middle and lower) in the confined space are quite different, only in this way can the safety of the workers entering the confined space be guaranteed.
▶▶▶ Open places: For example, open work and production workshops, portable gas detectors can be used because they can continuously, timely and accurately display the concentration of harmful gases in the site. In addition, the vibration function shall be configured to prevent the audible alarm from not being heard in a noisy environment, and the data information shall be read and stored for peak statistics to provide specific guidance for the health and safety of employees.
Understand the applied environmental conditions
Various gas detectors have strict requirements for the site environment, including dust and flow. Other impurities in the environment will cause great interference to the test results and cause unpredictable damage. Therefore, when purchasing a gas detector, the operating conditions of the operating environment should be clearly stated so that the manufacturer can give corresponding implementation plans to deal with it.
Understand the site safety
Generally, the site selected for gas detector assembly has mandatory requirements such as explosion-proof. The coal, petroleum and chemical industries have strict requirements for explosion-proof, and the instrument itself should be equipped with explosion-proof certification. Other environments are likely to require the gas detector to have environmental protection certification or measuring instrument license and other certificates.
Understand the functional requirements for use
The normal function of the gas detector is to check the gas concentration value, and to give an alarm for exceeding the limit. But users need not only these functions, but also signal output, current output, digital signal output, voltage output and switching value output. It is likely that there are also some other special provisions, such as network interface and wireless signal. In addition, data information recording and processing are also common provisions. These are specific functional provisions that should be fully considered in selecting gas detectors.