Door‑status Sensor — Detects whether a door is open or closed, used as an input device for access control systems.

Operating Distance: 18 mm ± 5 mm — The magnetic sensor pair will trigger when the two parts are either within ~18 mm (door closed) or separated (door open), ensuring reliable detection.

Switch Output: Normally Closed (NC) — The sensor uses a normally closed contact, which opens when the door opens — common configuration for security/lock‑control wiring.

Load Current: 500 mA — Indicates the maximum current the sensor’s contact can safely handle.

Switch Withstood Voltage: 100 VDC — The contacts are rated to switch up to 100 volts DC safely.

Compact & Simple Sensor Unit — The sensor is small and straightforward to mount, making it suitable for integration with door controllers, locks, or alarm systems.

Integration‑Friendly with Access Control Systems — Because of its NC output and standard electrical ratings, it can be wired easily with most electronic locks, access controllers, alarms or alarm panels to detect door status and trigger appropriate action (lock, alarm, log).

Improves Security & Safety Monitoring — With such a sensor, you can configure your system to alert or automatically relock if the door remains open beyond a set time (if supported by your controller), preventing unauthorized access or accidental door‑left‑open scenarios.