The limit switch magnetic from Yueqing Huilong utilizes non - contact sensing technology, offering superior durability compared to mechanical switches. This switch consists of a hermetically sealed reed switch and a permanent magnet, eliminating wear - and - tear from physical contact. The stainless - steel sensor housing (IP68 rated) allows submersion in water up to 10 meters, making it ideal for food processing, pharmaceutical, and marine applications. With a sensing distance of 5 - 20mm, it detects magnetic fields without physical contact, reducing maintenance costs by 70%. The switch supports both NPN and PNP output configurations, compatible with PLCs and microcontrollers. Operating over a wide temperature range (- 30℃ to + 150℃), it performs reliably in extreme environments, such as kilns, freezers, and chemical plants.