Glass Break Sensor Tutorial

Author: Ari Erenthal, Published on Mar 21, 2017

Burglars often break glass windows to get into a house. Using glass break detectors in conjunction with alarm contacts is a good way to protect the entire perimeter of a building. In this note, we examine glass break detectors, including

  • Shock vs Acoustic - 4 differences contrasted
  • Sensor ratings - thickness, size, type
  • Types of glass - plate vs tempered vs wired vs laminate
  • Shock sensors explained
  • Video demonstration of shock sensors
  • Acoustic sensors explained
  • 6 factors affecting acoustic glass break detector performance

******** ***** ***** ***** ******* ** *** **** * *****. Using ***** ***** ********* ** *********** **** ***** ******** ** a **** *** ** ******* *** ****** ********* ** * building. ** **** ****, ** ******* ***** ***** *********, *********

  • ***** ** ******** - * *********** **********
  • ****** ******* - *********, ****, ****
  • ***** ** ***** - ***** ** ******** ** ***** ** laminate
  • ***** ******* *********
  • ***** ************* ** ***** *******
  • ******** ******* *********
  • * ******* ********* ******** ***** ***** ******** ***********

[***************]

Shock ** ******** *******

*** *** **** ****** ***** ** ***** ***** ******* *** shock *** ********. *** *** *********** ***:

  • ********: ***** ** ******* ** *** ***** ******* ******** ** mounted ** * ******* ****** *** *****
  • ***********: ***** ******** *** ******** ******** (*.*., *****) **** ***** acoustic ******* *** ***** ** *** ***** ********
  • ***** ****: ***** ** **** ********* ******* ** ******** ******** to **** **** ******* ******** *** ******* ******** *****
  • ********: ***** ** **** ******** ***** ******** ***** ****** **** frequently, ********** ** ***** ************

Sensor ******* - ********* / **** / ****

******* *** ********* ***** ** * *********** **:

  • ********* - *** ***** *** ***** **
  • **** - *** ***** (***** / ******) *** ***** **
  • **** - **** **** ** ***** ** ***** ****

*** ****, *** * **** ****** ***:

  • ***** ***** ** *** **** ****** **** ** ***** ***** in *********** *** ***** ********** *********. **** ** ******, ** shatters **** ***** ****** **** ****** *****, *********** ** * loud *****. ** ******* ****** ** ** ********* **** ** breaks ******* ** ** ** **********.
  • ******** *****, **** ***** ** ****** *****, ** ***** ** patio *****, ************* *******, ********* *****, *** *** ***** ********* where * ****** ***** *********** **** **** *** ******* * large ***** ** *****. ******* ** ******* ***** ****** **** sharp, ****** *****, ** ******** **** **** ****** **** ** less ****** ** ***** ****** ******. ******** ***** ***** * much ******* ***** *** ******** **** **** ***** **** ******** than ***** ***** ** *****.
  • ***** ***** *** **** ******* ***** **, ** ***** ** absorb ***** *** ********* **** ************. ** ** ******** ***** in **** ***** *** ********** ************. **** ***** ** ******, everything **** *****, ** ****** ***** *****.
  • ******** ***** ** *** ****** ** ***** **** * ***** of ******* ********** ******. *** ******* ******* **** ** *** shock. ** **** *****, **** ***** ** ******, ********** **** *****, ** ****** ***** break.

*** *******, ** *** ******* *****, ****** *** *** ************ has ********* *********** ***** ** **** ********* *** ****:

** ********, ** *** ******* *****, *** ************ ********* **** and ******* ****:

*** ************* ***** ****** ** ******* *** **** ***** *** plan ** *** *** ******** ** ****** ***** *******.

Shock *******

***** *******, ********* ************ ****, *** ******* ******** **** *** ***** ****** ***** ****** sided ****. ****** ** * ********** ** * ** (******** closed) *******. **** *** ********** ********* *****, *** ******* *****, sending ** **** **** ****** ** *** *****. *** ****** shock ******* **** ********* *** ***** ******** ******** *** ****** vibrated *** ** ******* ******* ** *** ****** ********, *** newer, ********** ***** ***** ******* *** **** ** *********** *** vibration ******* ** * ****** ********** **** ***** ***** ** vibration, *** ******** *** ***** **** ** ********** ***** ** open. ***** ******* *** ******** ** ******* * ****** **** of *****. ** * ****** ** **** *** ******** ***** of *****, **** **** **** **** *** *** ***** ******.

******* ***** ******* *** ******** ** ****** *** ***** **** that *********** *** ********** ** ** ****** **** ** *****, it ****** ****** ****** ******** *****. * ***** ****** **** *** **** ** * ******* uses * ******** ****** ** **** * ****, ******** **** is********* ** ** *********** ********* ****. *******, * ******** ******** ***** ****** **** both ******** ********, **** ** ***** ***** *********, *** ******** sensors, **** ** ****** *********, ** ********** **** *****.

***** ******* ****** ** ******* ** *** ****** ** *** window **** ** **** ********. *** ************ ****** **** ******* the ***** ******** **** *** ****** *****, ******* * **** (2.4cm) **** *** *****. *** ************ **** **** ******* *** maximum ***** ********* *** ********* **** ******, ******** */*" (*.****) thick **** ** *' (*.**) ** **' (**) ******.

** **** * ***** ******, ****** *** ***** ** *** opposite ****** **** *** ****** ** ******* **. *** * blunt ****** ** ******* ****** ** **** ****, **** ** the **** ** ** ********* ***********. ******* * ***** ****** requires ******* *** ***** **** ***** * *** ** *****, but ***** **** ***** **** ** ******** ********* ** * shattering ******.

Video ************* ** ***** *******

** **** ***** *****, ** **** **** ***** ******* ****** false ****** **** **** *** ****** ** ******. **** **** the ****** ** ****** **** ***** **** *** ***** ****** trigger ** *****:

Acoustic *******

** ******** ****** ******** ** * **********, * **********, *** an **** ************** ********** **** *** ***** ********* ** ********* types ** ***** ********. **** ********** * **** **** * number ** *******, ********** ********* ****** ** ***** **** *** at **** ** ******** ** ******** ***** ***** ****** ** the ****. ** ********* *** ************'* ********* ************, ********** *** mount *** ****** ** * **** **** ***** ** **** windows ** ******** ****** *** ******'* ********* ****.

** ***** ** **** *** ** ******** *******, ********** ****** keep ** **** **** ***** ******* ** *****. *** ***** of *** **** *** *** ********* **** **** ** **** room ** ***** ** **** ** ****** ** *** ***** waves ******, *** **** ** **** ***** ***** ****** **** the ****** ** *** ***** ** *** ******** ******, *** how ********** *** ****** *** ********* *** ****** ***** *****. For *******, *** ****** **** ********* * ***** *********** ** a **** **** **** ** **** ******** **** ** * room **** **** ** **** ********, ******* *** **** ******** will ******* **** ** ***** ***** *** *** **** ******** will ****** **** ** ****.

**** ******* **** ********** *********** ******. ** ******** *** ****** of ***** ******, *********** ****** ** ****** **** ** ***** with ***** ********** ******** *** ****** ** ** ***** **** sound ********* ********. *******, ******, **** ********, *** *********** ********* all ****** *****. **** ********, **** ******, *** ******** ******* furniture *** ******* *****. *********** **** ** ******* ***** ***** books ********** **** ** ****** **. **** ************* **** ******** sensors **** ******** ***************. ** * ***** ***** ** ************ prone ** ***** ******, ******** *** ****** ** *** **** adaptive **********, ** * ****** **** ******* ************ **** ********* noise ********, *** **** ******* ****** ***** ******.

**** ************* **** * ***** ***** *********, ***** ** * device **** ***** *** ***** ** ********* ***** ** ***** breaking. ***** * ***** ***** *********, ** ********* *** ***** an ******** ***** ***** ******** ******* **** * * **** battery *** *********** ***** **, ****** ********* ***** ** ***** to ********* *** ******* ********* *** *********** ******. ***** ***** noise ******** ****** **** ************ ** ************, ** ** **** to **** * ****** **** * ********* **** *** **** manufacturer.

Hard ******** ******** ***** ******

**** ******** **** ** ******* *****, ******, *** ************* ***** all ******* ****** ***** ** **** * *** **** *** be ************** ** ******** ***** ***** *********. **** ********** ****** with **** ********, ***** *** *********** ** *** ********.

Dropping ******** ***** ******** ***** ******

**** ***** ********, ** ******* * **** **** ***** *** a **** ******* ***** ** *** **** ****, *** ** for **** ****** ***** ********* **** ******** ***** ****** *** listening ***. ***** **** ****** * ************ ***** **** ******* can ** ************** ** ***** ***** *********. **** ******* **** a ***** *** ********* *** ******* *** ***** ******. *** IPVM **** **** *** *** * ***** ***** ******** ********** * *** ** ********, ****** ** *** ******* ** *** ********* ****** * lower **** ***** **** *** ******** **********. ***** *********** ****** be ***** ***** *** ***** *****'* **** ** ********* **, and ** **** ** ***** ********** ******* ****, *********, ***** supplies, ** ******* ******** ******* ** **** **** ***** *** alarm ** *****.

Children ******* ********* ***** ******

********** ****** ** ******* **** ********** ******** ***** ***** ********* in *********, ********** ********** ****. ******** ***** ************* *** *** acoustic ***** ****** ** ******** *** *****, ******** *****, *** generally ***** ****. ** ********* ***** * ***** ***** ********* and * ******* ******* ***** ***** ********, ** ********* *** discover *** ***** **** ** ******* * ******** ** * way **** ******* * *** ********* **** **** *** *****. If ** **** **** *** ** *****, ******-******* ***** ******* are *********** *******.

Humidity ****** ******** ******* ** ***********

******* *** ********** ****** ** ******** ****** ******** * ***** element, ******** ******* ****** *** ** **** ** ********* **** regular **** ********, **** ** *********.

Kitchens *** *********** ************ *** ******** *******

******** *** ******* ******* ** **** ******** **** ** ****, stone, *** *****. ******* ******, ****** ******** **********, *** ******* from ******** *** *** *** *** ******** ***** ***** *********. A ***** ***** ********* ****** ** **** ** ****** * practical ******** ******** ****. ******** **** ***** *** *********** *** also ***** ******** ****** ************.

Drapes ***** ***** ***** *********

**** ******** ******* ****** ********* ***** ******. ** ********, ***** a ***** ***** ******** ****** **** ** ******* ********* ******** in *** **** ***** *** ****, ****** ********, ******* *** window *** *** *****, *** ** ****** ** *** ***********.

Comments (4)

Great article. I'm glad I made the investment in IPVM, it almost ensures I will learn something new every day.

great article ari!

very informative !especially for me that i did not know about that high humidity issue with glass break detectors

Very informative article, thanks Ari

Thanks for this. I've been wondering about how GBD's and siren circuits work for years.

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