Petroleum is a high-quality energy and chemical raw material, known as the "blood of industry". The different environmental climates, storage conditions, and unpredictable special conditions around the world pose significant challenges to oil tank monitoring.The importance of oil, as an eternal resource and economic topic, is self-evident. No matter what type of oil is stored in the tank, precise monitoring of liquid level monitoring equipment is required to ensure its storage safety. 1. The monitoring equipment needs to be simple to debug and easy to use; 2. The system is easy to deploy without changing the tank structure; 3. Multi party linkage can facilitate timely alarm and response of faults; 4. The monitoring product must be explosion-proof.