Stable performance: Designed for precision and reliability, this current sensing switch provides accurate sensing while simplifying wiring, offering a practical improvement over traditional transformers and thermal protectors. Integrated power supply: Selfcontained power allows operation without an external source. LED indicator light: Builtin LED shows current sensing status and clearly indicates the AC current range from 2 to 30 A. Robust construction: Uses tube technology and a selfextinguishing ABS housing, delivering good resistance to heat, acid, and alkali, along with durability and safety in demanding settings. Use scenarios: Industrial equipment: monitor mains current and trigger protective or control actions for motors, transformers, or power strips. Lab and test benches: integrate into experiments to switch or signal based on measured current. HVAC, appliances, and small machinery: add reliable currentbased control to improve safety, energy management, and system reliability. Key benefits: Simplifies setups with an integrated power source and clear status indication. Versatile sensing for 2–30 A AC loads. Durable, heat and chemicalresistant enclosure for demanding environments.