After our technical engineers visited the site to understand the situation, and considering the characteristics of the high-pressure vessel, such as large temperature differences and the inability to drill holes, we recommend the following selection: Model: SER-YW (Explosion-proof), (Two-wire), (Small Blind Zone) Probe Cable Length: 20M Tank Type: Spherical Tank Measuring Range: 0-15000 mm Output Signal: 4-20 mA DC + HART Power Supply: 24V Temperature: -50°C~80°C Wiring Method: Two-wire Display Resolution: 1mm Measurement Error: ±0.1% FS Probe Operating Temperature: -50℃～+80℃ Operating Humidity: 15%～100%RH Explosion-proof Rating: ExdⅡCT6Gb; Level Display: LCD Display Calibration Equipment: With Calibration Probe Special Requirements: SIL3 Certification Protection Rating: IP67; Installation Method: Magnetic After a year of operational testing, our externally mounted level gauge has proven to be stable, providing real-time tracking of liquid inflow and outflow without any jumps. It overcomes temperature drift interference and achieves a measurement accuracy of 0.1%. This not only solves the problem of not being able to drill holes for level measurement in spherical tanks, but also effectively replaces previously imported radar products, significantly reducing production costs for users and ensuring both economic efficiency and safety. This has earned high praise from our customers. They plan to continue using our externally mounted level gauges for future tank measurement, and we will continue to strive to provide them with even better products and services.