In the second quarter of this year, China’s Ministry of Agriculture expanded the scale of national intelligent demonstration aquaculture bases. New standardized smart fishery pilot parks have been arranged in both coastal and inland major breeding provinces. The integrated solution combining variable frequency permanent magnet aerators with real‑time dissolved oxygen (DO) IoT monitoring systems has become the mainstream configuration in these demonstration farms.
Unlike traditional aerators that run all day regardless of actual oxygen demand, the intelligent PMSM system connects underwater DO sensors via wireless IoT modules. When water dissolved oxygen drops below a preset threshold, the system automatically starts the aerator and adjusts operating frequency. Once oxygen concentration returns to the standard range, the equipment reduces speed or shuts down intelligently, avoiding unnecessary idle power waste. This dynamic control further cuts total electricity cost on top of the inherent energy‑saving advantage of permanent magnet technology.
At a large‑scale intelligent fish farm in the Guangdong Pearl River Delta, one‑year operational data showed a significant drop in total annual power expenditure compared to the old equipment setup, while aquatic survival rate improved thanks to stable dissolved oxygen control. Domestic aquatic equipment manufacturers are independently upgrading their intelligent control systems, enabling one‑key remote management of all on‑site aerators via mobile phones. Farmers can check real‑time running status, historical power consumption, and equipment fault alarms anytime. Driven by the national smart agriculture plan, inland freshwater fish farming areas such as Hunan, Hubei, and Anhui are also accelerating the adoption of IoT‑connected permanent magnet aerators, shifting from extensive manual breeding to a more refined digital farming model