ZDMS0.9/40S-PL60/EX explosion-proof automatic tracking and positioning fire monitor is independently developed by Shanghai Pulin Intelligent Mechanical and Electrical Equipment Co., Ltd., a high-tech explosion-proof fire-fighting product integrating alarm and fire fighting. The explosion-proof mark is ExdIIBT4, which is suitable for the explosive gas environment where the representative gas is ethylene, and can also be used for the explosive gas environment where the representative gas of group IIA is propane.