An Introduction to the Applications of Gas Detectors in Different Occasions
A) Fixed gas detector:
This is a commonly used detector in industrial equipment and production processes. It can be installed at specific detection points to detect specific gas leaks. Fixed detectors are generally two-piece, with a detection head composed of sensors and transmitters installed as one unit at the detection site, and a secondary instrument composed of circuits, power supplies, and display alarm devices installed as one unit at location for easy monitoring.
Its detection principle is as described in the previous section, but it is more suitable for the continuous and long-term stability required for fixed detection in terms of process and technology. They also need to be selected based on the type and concentration of the gas on site, and attention should be paid to installing them in specific areas where the gas may leak, such as selecting the effective height of the sensor installation based on the specific gravity of the gas, and so on.
B) Portable gas detector:
Due to its convenient operation and compact size, the portable instrument can be carried to different production sites. The electrochemical detector is powered by alkaline batteries and can be used continuously for 1000 hours; The new LEL detectors, PID and composite instruments use rechargeable batteries (some have already adopted memory free nickel hydrogen or lithium-ion batteries), which allow them to work continuously for nearly 12 hours. Therefore, as such instruments are increasingly being used in various factories and health departments.
