Based on this product's specifications, here are some alternatives and similar models
Reed Switch Door Contact KN-CA52D*P5 — No name — KN-CA52D*P5
Summary description:
Reed switch door contact KN-CA52D*P5 by No name is a magnetic contact sensor intended for monitoring doors or windows. The device detects opening and closing events via a magnetically actuated reed switch and is suitable for integration with alarm panels or access control systems. Typical use cases include perimeter security, intrusion detection, and monitoring entry points in residential or commercial installations.