For power plants, accurate level measurement in reaction kettles is critical for safety, efficiency, and stable chemical dosing. The flange-mounted magnetostrictive level gauge is a proven import substitute for conventional high-cost instruments. It uses magnetostrictive sensing to detect float position along a waveguide, delivering continuous level data with high repeatability and low drift. The flange mounting simplifies installation on existing nozzles, enabling fast retrofit without tank modification. The substitute is designed for high temperature, high pressure, and corrosive media, with wetted parts in 316L stainless steel or Hastelloy and robust sealing for power plant reaction vessels. Outputs include 4-20mA, HART, and optional RS485, supporting DCS/PLC integration. Explosion-proof and anti-interference designs suit demanding plant environments. Local manufacturing shortens lead time, reduces spare-part cost, and provides responsive technical service while maintaining form-fit-function compatibility. The sensor's non-contact magnetic coupling reduces wear, while the sealed flange and rigid stem resist vibration and process turbulence. Optional LCD and alarm switches improve onsite visibility. Each unit is pressure-tested and factory-calibrated. Before replacement, verify flange size, pressure rating, temperature, medium density, and float material. Installation should keep the stem vertical, avoid strong electromagnetic sources, and secure reliable grounding. Commissioning includes zero/span verification and HART configuration for the plant DCS. With easy maintenance, this import substitute helps power plants improve level reliability, lower lifecycle cost, and secure supply chain independence.