Ring Alarm Contact Sensor - 2nd Gen | Instant Window & Door Alerts | Approximately 3-Year Battery Life | Slim Design Fits Any Frame | Easy Installation | Base Station Required

With door and window alarm sensors, enjoy the additional peace of mind of knowing you’ll be alerted when a door or window opens. We offer a variety of sensors to accompany the most popular security …

Dec 31, 2025 · Discover the 7 best door sensors of 2026 for enhanced security. Compare features, pros, and cons to find the perfect sensor for your home.

Get free shipping on qualified Door Motion Sensors & Alarms products or Buy Online Pick Up in Store today in the Electrical Department.

Shop Best Buy for door alarms and window alarms. Enjoy peace of mind by finding the right window & door alarm sensors for your home’s entry points with smart home integrations.

Shop for Smart Door Sensors in Smart Detectors & Smart Sensors. Buy products such as Bitiwend Door Alarm Sensor Bitiwend Wireless Door Chime Alert for Kids Safety Home (1 Receiver+3 Sensors) at …

These sensors affix to the door or window and, if opened when the alarm is set, can trigger the alarm to sound and alert the authorities. Adding these sensors throughout the home makes your home …

At The Home Security Superstore, we offer a selection of magnetic door alarms that are not only user-friendly but also compatible with most standard doors, making them an ideal choice for a wide range …

Oct 24, 2025 · Most door alarms use a type of contact sensor that relies on what’s called a reed switch and a magnet. When the door is closed, the magnet keeps that reed switch circuit closed. When the …

Fits on all types of doors and windows. Setup is a snap -- magnet can be placed up to 2" apart. Chimes when your door or window opens. Get it delivered as soon as tomorrow. Schedule your delivery in …