... lens D7012Fresnel lens arrays designed for Passive Infrared Sensor ,the optical surfaces are increases lens sensitivity for PIR sensor applications.1 ... used in PIR motion detector, security system, burgle alarm, lighting switch control and moreMore choose:D7007,D7008,D7009,D7010,D7011,D7013 ... ,welcome your inquiry . Fresnel lens for pir motion sensor switch D7 series