2 Pack 100db Glass Break Alarm Are Set Off When Glass is Hit Or Broken
2 Pack 100db Glass Break Alarm Are Set Off When Glass is Hit Or Broken
2 Pack 100db Glass Break Alarm Are Set Off When Glass is Hit Or Broken

Glass Break Alarm 100dB 2-Pack – Vibration Sensor Triggered Siren, Peel-and-Stick Adhesive Mount, Auto-Reset After 30 Seconds, Battery Powered, Window Security for Home and Business

SKU: ST-GLASS
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$15.00

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Windows are one of the easiest entry points in any building, and standard door alarms won’t help if someone comes through the glass. This 2-pack of glass breakage alarms uses built-in vibration sensors that trigger a 100dB siren when the glass is hit, knocked, or broken. They mount in seconds with peel-and-stick adhesive — no tools, no wiring.

  • 100dB siren triggered by vibration sensor when glass is impacted or broken
  • Alarm sounds for approximately 30 seconds, then auto-resets
  • Peel-and-stick adhesive installation — no tools or wiring needed
  • 2-pack included for coverage on multiple windows
  • Powered by three LR44/AG13 button cell batteries (included)

Your Door Can Be Locked and Your Window Can Still Be Open

Most people lock their doors but don’t think much about their windows. A door alarm won’t trigger if someone breaks or forces a window pane. Glass break alarms fill that gap by responding to the vibration of impact on the glass itself — whether it’s a full break, a crack, or a hard knock.

This 2-pack gives you coverage on two entry points right out of the box, with nothing to install beyond peeling off an adhesive backing.

Who This Glass Break Alarm Is For

Homeowners who want to supplement their existing security without adding a full system. Renters who can’t install permanent hardware. Small business owners who want after-hours notification on storefront glass or display windows.

Anyone with ground-floor windows, basement windows, or glass doors that represent a potential entry point. Two units cover two windows — additional packs can cover more.

Is This the Right Choice for You?

Choose this glass break alarm if you want:

  • Vibration-based detection specifically for windows and glass panels
  • No-tools adhesive installation that works for renters and homeowners
  • An auto-resetting alarm that re-arms itself after each trigger

Consider something else if you need:

  • Coverage for doors and non-glass entry points (magnetic alarms are better)
  • Remote notification to your phone when you’re away from the property

Simple Technology, Straightforward Results

The vibration sensor inside each unit is tuned to detect the specific types of impact associated with glass being struck or broken. When triggered, it activates a 100dB siren — loud enough to be heard clearly throughout a house and by neighbors in close proximity. For reference, 100dB is comparable to a power drill or a loud motorcycle. It’s attention-getting without being earsplitting.

The alarm sounds for approximately 30 seconds and then automatically shuts off and resets. This means it’s ready to trigger again without any manual intervention. The on/off switch lets you disarm the unit when you want to open a window normally — no false alarms when you’re airing out the house. Each unit runs on three LR44/AG13 button cell batteries, which are included. These are common, inexpensive batteries available at most stores.

Quick Comparison: How Does a Glass Break Alarm Stack Up?

Feature Glass Break Alarm (100dB) Magnetic Door/Window Alarm Motion Sensor Alarm Security Camera
Detects Glass Impact Yes ✓ No No No (visual only)
Detects Opening No Yes ✓ No Yes (with alerts) ✓
Volume 100dB ✓ 90–120dB 90–110dB Varies
Installation Adhesive ✓ Adhesive ✓ Adhesive/shelf Mounting required
Auto-Reset Yes ✓ Resets when closed Varies N/A
Best For Window glass protection Door/window opening Room coverage Visual monitoring

Practical Details

Each unit measures 2½ x ¾ inches. Weighs 0.2 lbs per unit. White housing. Powered by three 1.5V LR44/AG13 button cell batteries (included). 100dB siren with approximately 30-second duration and auto-reset. On/off switch for daily use. Mounts with peel-and-stick adhesive. 2-pack included. Manufactured by Safety Technology.

Two windows, two alarms, zero installation hassle. A simple, affordable layer of security for the entry points most people overlook.

Frequently Asked Questions

Will this go off if I knock on the window or if it vibrates in the wind?

The vibration sensor is calibrated to respond to the type of sharp impact associated with glass being struck or broken — not ambient vibrations from wind or light contact. That said, a hard knock directly on the glass where the unit is mounted could trigger it. If you live in an area with frequent strong storms that rattle windows, you may occasionally get a false trigger, but normal wind and rain shouldn’t set it off.

How long do the batteries last?

Button cell batteries in standby mode last quite a long time — typically several months to a year depending on the brand and storage conditions. The alarm only draws significant power when actually triggered. It’s good practice to test the units every few months by switching them on and tapping the glass to confirm the siren sounds. If the sound is noticeably weaker, it’s time to replace the batteries.

Can I use these on sliding glass doors?

Yes. The vibration sensor responds to impact on any glass surface. Mount the unit directly on the glass panel of a sliding door, and it will trigger if that glass is struck or broken. Keep in mind that it won’t detect the door being slid open — for that you’d want a magnetic door alarm that detects separation. Using both types together gives you comprehensive coverage on sliding glass doors.

ManufacturerSafety Technology
ColorWhite
Decibles100 db
BatteryThree 1.5V LR44/AG13 Button Cell (Included)
Weight0.2 lbs
Dimensions2 ½” x ¾”

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