90 dB Window Door Sensors

A loud 90 dB siren triggers the instant a window or door is opened — no tools, no wiring, no installation headaches. Each pack includes two magnetic sensors that mount with adhesive tape and run on included batteries, so you can have multiple entry points protected in minutes.

Window and Door Sensor Features

• 90 dB siren — loud enough to alert you and deter intruders
• Magnetic design — triggers when door or window separates from the frame
• Two units included — cover multiple entry points with one purchase
• Tool-free setup — adhesive tape mounts to any surface in seconds
• On/off switch — disable when opening intentionally
• Batteries included — 3x LR44 per unit, ready to use out of the box
• Compact size — 2.5" x 1.75" x 0.75", unobtrusive on any window or door

Works on windows, doors, and sliding glass doors. A practical choice for homeowners, renters who can't drill, and anyone securing a temporary space like a hotel room or vacation rental.

Are window alarm sensors effective?

For entry-point detection, yes. The magnetic design means any separation between the sensor and its magnet — whether from opening or forced entry — triggers the alarm immediately. The 90 dB output is comparable to a smoke alarm and loud enough to be heard from another room. These work best as a first layer of detection alongside other security measures, not as a standalone system.