SI-RF series safety switches from Banner Engineering use RFID technology to monitor doors, gates and other movable mechanical safeguards that separate personnel and equipment from a hazard. The compact, low-profile design fits in any space, and single and cascade models are available to protect one or multiple entry points. This non-contact system operates at the highest levels of safety, resists tampering and nuisance trips and offers diagnostic capabilities that make it easy to resolve problems and minimize machine downtime.