The radar level gauge is used to detect the liquid level of oil tanks, which is connected to the system through the PROFIBUS DP network. The multi-point average temperature transmitter is connected to the system through the MODBUS network for temperature measurement. The temperature is used as density compensation, and is processed by the upper computer software to reflect the storage capacity and inventory in real time. Then, it can be uploaded to the enterprise information management layer through the industrial Ethernet, achieving daily clearance of purchase, sales, and storage, and generating various reports.

This project example is applied to a certain oil and fat group in Xi'an, where the liquid level and temperature signals are used as real-time monitoring for oil collection and delivery. It is combined with the quality flow meter (PROFIBUS DP network access system), pneumatic ball valve, etc. to achieve fully automated operation for oil collection and delivery loading. Combined with the low local temperature, the automatic pipeline cleaning operation after oil delivery is completed is increased, and the system has been running smoothly and reliably since its operation.