"Quanren Electronic Technology Co.,Ltd is a leading manufacturer and engaged in development and research of inductive PCB sensor which widely used in water/gas meter and automation industries. We produce over 6millon pcs inductive sensors every year for global market. Inductive PCB metering sensor and Factor1 inductive proximity sensor with chip WF8002 are our own patent products. This chip-based inductive sensor can be adapted to LoraWAN,GPRS,LTE,NB modules in smart water/gas meter application. Factor 1 (non-attenuation) proximity sensor is a new and attractive product.Longer detecting distance,high working frequency,strong anti-interferences and same switching sensing distance to different metal material as Al,ST37,VA,Ms,Cu are all its significant performances.