1. The gas/foam interface can be accurately measured. It can also show the process from foam density to coke formation;
2. Not only can gas, foam, coke and water be distinguished, but also thin bubble and thick bubble can be distinguished. The output signal changes with the state of substances in the tower and the change of pressure, temperature and gas volume in the coke tower;
3. The detector is attached to the outer wall of the coke tower and does not require special treatment, making installation simple;
4. The output record curve has no drift, and the density curve is uniform and stable.

1. The density resolution of the materials in the tower is<± 2%, which can effectively distinguish the density change of different materials (thin foam, thick foam, water, coke) in the tower and the change trend of the interface between different materials;
2. The response time of the instrument to changes in material density inside the tower is less than 10 seconds;
3. When the foam height reaches the height of the measuring point, the absolute error of the displayed value is<10cm;
4. The host outputs a 4-20mA signal to the DCS through an isolation barrier, where the 4-20mA signal is proportional to the relative percentage density of the materials in each detection point tower. The explosion-proof level of the measurement system is: ExdIICT4； Protection level: IP65。

In the industrial production process, equipment such as polymerization kettle, reaction kettle, catalyst feeding tank, degassing bin, flash tank, material bin, container, boiler ash bin, thermal power plant coal bin ash bin, ash hopper, storage tank, etc. Equipment such as ammonia separation tower, condensing tower, medium pressure separator, copper washing tower, methanol separator, absorption tower, regeneration tower, synthesis tower, stripping tower, glass melting furnace, polymerization kettle, oxidation kettle, reaction kettle, storage tank, etc.