YK series pressure switch (also known as pressure controller) is developed by using special materials, special craftsmanship and learning from the technical advantages of similar products at home and abroad. It is a relatively advanced micro switch in the world.This product has reliable performance and easy installation and use. It is used in heat pumps, oil pumps, air pumps, air-conditioning refrigeration units and other equipment that needs to adjust the pressure of the medium by itself to protect the pressure system.