Door and window alarms — magnetic contact sensors with sirens or app alerts.
Door and window alarms use a magnetic contact sensor that triggers when a door or window opens, which is the simplest way to protect entry points in homes, flats, offices and shops. Standalone alarms have a built-in siren and work without a hub, which makes them a cheap, easy option for renters and small spaces. Wireless sensors that connect to an alarm system or smart home app send alerts to your phone. Chime modes beep when a door opens, which is useful for shops, children's rooms and homes with elderly relatives. Check the sensor size, wireless frequency, battery type and compatibility with your alarm system before ordering. Adhesive mounting needs no tools.
Motion: infrared detectors.
Related categories: Security Alarm, Alarm System, Infrared Detector