Generally speaking, the following factors should be taken into account when selecting camera explosion-proof shield: 1. & nbsp; the explosion-proof shield grade should be selected according to the actual determined dangerous area more than or equal to the required explosion-proof shield grade. 2. & nbsp; the protective level of protective shield has explosive dangerous environment, which may be indoor environment or outdoor environment, especially the natural conditions such as sand, dust, rain, fog, humidity, high temperature and low temperature in outdoor environment, also exist, and their severity varies with different regions. Therefore, when choosing explosion-proof shield, we should fully investigate the natural climate and environmental conditions of the site, and select the appropriate protection level. For the dust explosive dangerous environment, the dust-proof of equipment has been reflected in its explosion-proof requirements, so once the equipment is used in a more harsh outdoor environment…