Limited space refers to a closed or partially closed space with narrow and limited entrances and exits, not designed as a fixed workplace, and with poor natural ventilation, which is likely to cause accumulation of toxic and harmful, flammable and explosive substances or insufficient oxygen content. Confined space operation refers to the operation activities carried out by operators entering a limited space.
There are three types of finite space:
The first category: closed equipment such as cabins, storage tanks, vehicle tanks, reactors, pressure vessels, pipes, flues, boilers, etc.
The second category: underground limited space such as underground pipelines, basements, underground warehouses, underground engineering, abandoned wells, cellars, sewage pools, biogas digesters, septic tanks, sewers, etc.
The third category: limited space on the ground such as storage room, fermentation tank, garbage station, cold storage, granary, etc.
Before entering, personnel enter limited spaces (such as storage tanks, sewers, septic tanks, agricultural storage silos, tunnels, etc.) to operate. The concentration of harmful gases in the working environment must be detected. Here, it is necessary to use a gas detector to solve the problem. The gas detector is also called a gas alarm. The gas sensor is used to detect the type, composition and content of the gas in the environment.
There are toxic and harmful gases, flammable and explosive gases diffuse and leak in the limited space, resulting in risks such as hypoxia, poisoning, and explosion. For the risk of poisoning, hypoxia asphyxia and gas explosion, the most direct and effective method is to use a gas detection alarm for targeted detection.
Detection of gas detectors
1. It has a pumping function, so that it can be detected by non-contact and sub-part. The upper, middle and lower gas distribution and gas types are very different in different parts of the limited space, and you can choose a built-in pump or an external pump.
2. It can detect the concentration of various gases at the same time to detect dangerous gases distributed in different spaces, including inorganic gases and organic gases;
3. It can monitor the oxygen concentration function to prevent hypoxia or oxygen enrichment;
4. The gas detector must be small in appearance, easy to operate and read, and will not affect the normal work of workers.
