User manual

Updated December 8, 2020

AJAX GlassProtect Wireless Glass Break Detector

GlassProtect is a wireless indoor glass break detector recognizing the sound of shattering the glass at a distance of up to 9 meters. GlassProtect can operate up to 7 years from a pre-installed battery and has a socket for connecting a third-party wired detector.
GlassProtect connects to the Ajax security system via the protected Jeweller radio protocol. The communication range is up to 1,000 meters in line of sight. Also, GlassProtect can be connected to third-party security systems using the Ajax uartBridge or Ajax Oxbridge Plus integration modules.
Users can configure GlassProtect via the Ajax app for macOS, Windows, iOS, or Android. The system notifies users of all events through push notifications, SMS, and calls (if activated).
The user can connect the Ajax security system to the central monitoring station of a security company.
Buy breakage detector GlassProtect

Functional elements

AJAX GlassProtect Wireless Glass Break Detector- Functional elements

  1. LED indicator
  2. Microphone hole
  3. SmartBracket attachment panel (perforated part is required for actuating the tamper in case of any attempt to dismantle the detector. Don’t break it out!)
  4. External detector connection socket
  5. QR code
  6. Device switch
  7.  Tamper button

Operating Principle

GlassProtect uses a sensitive electret microphone to detect the sound of glass breaking, consisting of a low-frequency hit sound and high-frequency crashing sound of glass shatters. Such two-stage glass break detection decreases the risk of false triggering.

warning GlassProtect detector does not react to the breaking of the vered glass: shockproof, sunscreen, decorative, or any other type of To detect the breaking of such kind of glass, we recommend using the DoorProtect Plus wireless opening detector with shock and tilt sensors.

If triggered, GlassProtect immediately transmits the alarm signal to the hub , activating the sirens (if connected) and notifying the user and security company.


Detector Connection to the hub
Before starting connection:

  1. Following the hub user guide, install the Ajax app. Create the account, add the hub, and create at least one room.
  2. Switch on the hub and check the internet connection (via Ethernet cable and/or GSM network).
  3. Make sure that the hub is disarmed and does not update by checking its status in the Ajax app.

warning Only users with administrator rights can add the device to the hub.

Pairing the detector with hub:

  1. Select Add Device in the Ajax app.
  2. Name the device, scan or type the QR code (located on the detector body and packaging), and select the location room.AJAX GlassProtect Wireless Glass Break Detector- Add Device
  3. Tap Add — the countdown will start.
  4. Switch on the device.

AJAX GlassProtect Wireless Glass Break Detector- Switch on

For detection and pairing to occur, the detector should be located within the coverage area of the wireless network of the hub (at a single protected object). The connection request is transmitted for a short time: at the moment of switching on the device.
If the device failed to pair (LED blinks once per second), switch it off for 5 seconds and retry. The detector connected to the hub appears in the list of devices in the app. The update of the detector statuses in the list depends on the device ping interval set in the hub settings (the default value is 36 seconds).

Connecting to Third-Party Systems

To connect the detector to a third-party central unit using the uartBridge or Oxbridge Plus integration module, follow the recommendations in the user manual of the respective device.


  1. Devices
  2. GlassProtect
Parameter Value
Temperature The temperature of the detector, is measured on the processor and changes gradually
Jeweler Signal Strength Signal strength between the hub and the detector
Connection Connection status between the hub and the detector
Battery Charge The battery level of the device. Displayed as a percentage
How battery charge is displayed in Ajax apps
Lid The tamper state, which reacts to the detachment of or damage to the detector body
Delay when entering, sec Delay time when entering. The option is available only with a connected wired detector.
Delay when leaving, sec Delay time when exiting. The option is available only with a connected wired detector.
Sensitivity The sensitivity level of the sensor
Secondary detector Status of the external detector connection to GlassProtect
Routed Through ReX Displays the status of using the radio signal range extender ReX
Always Active Indicates whether the detector is always armed
Temporary Deactivation Shows the status of the device temporary deactivation function:
No — the device operates normally and transmits all events.
Lid only — the hub administrator has disabled noti the device body.
Entirely — the device is completely excluded from the system operation by the hub
administrator. The device does not follow system commands and does not report
alarms or other events.
By number of alarms — the device is automatically disabled by the system when
the number of alarms is exceeded (speci in the settings for Devices Auto
Deactivation). The feature is coned in the Ajax PRO app.
By timer — the device is automatically disabled by the system when the recovery
the timer expires (speci Devices Auto Deactivation). The feature is coned in the Ajax PRO app.
Firmware Detector e version
Device ID Device identi


  1. Devices
  2. GlassProtect
  3. SettingsSettings menu
Setting Value
First Detector name, can be edited
Room Selecting the virtual room to which the device is assigned
Delay when entering, sec Selecting delay time when entering. The option is available only with a connected wired
Delay when leaving, sec Selecting delay time on exit. The option is available only with a connected wired detector.
Delays in night mode Delay turned on when using night mode
Arm in night mode If active, the detector will switch to the armed mode when using night mode
Alarm LED indication Allows you to disable the indicator during an alarm. Available for devices with eversion or higher
How to e-version or the ID of the detector or device?
Sensitivity Choosing the sensitivity level of glass break detector:
External contact enabled If active, the detector registers external detector alarms
Always active If active, the detector always registers glass breakage
Alert with a siren if glass break detected If active, added to the system are sirens activated  when the glass break detected
Activate the siren if an additional contact is open If active, added to the system are sirens activated in case of an external detector alarm
Jeweller Signal Strength Test Switches the detector to the Jeweller signal strength test mode
Detection Zone Test Switches the detector to the detection area test
Attenuation Test Switches the detector to the signal fade test mode (available in detectors with eversion 3.50 and later)
Temporary Deactivation Allows the user to disconnect the device without removing it from the system.
Two options are available:
Deactivate entirely — the device will not execute system commands or participate in
automation scenarios and the system will ignore device alarms and other noti Deactivate lid noti — the system will ignore only noti triggering of the device tamper button Learn more about temporary deactivation of devices
The system can also automatically deactivate devices when the set number of alarms is
exceeded or when the recovery timer expires.
Learn more about auto deactivation of devices
User Guide Opens the User Guide for detector
Unpair Device Disconnects the detector from the hub and deletes its settings


Event Indication Note
Turning on the detector Lights up green for about one second
Detector connection to the ,
and hub Oxbridge Plus uartBridge
Lights up continuously for a few seconds
Alarm / tamper activation Lights up green for about one second The alarm is sent once in 5 seconds
Battery needs replacing During the alarm, it slowly lights up green and slowly goes out Replacement of the detector battery is described in the Battery Replacement

Functionality testing

The Ajax security system allows conducting tests for checking the functionality of connected devices.
The tests do not start immediately but within a period of 36 seconds when using standard settings. The test time starts depending on the settings of the detector ping interval (the paragraph on “Jeweller” settings in hub settings).
Jeweller Signal Strength Test
Detection Zone Test
Attenuation Test

Detector functionality testing

Having door and having ed the device with the bundled adhesive tape, test the detection zone.
instructions GlassProtect does not react to clapping!

Testing the detector

Hit the glass with your making it. If the detector catches a low-frequency sound, the LED blinks. Simulate a high-frequency glass
shattering sound for 1.5 seconds after the ool or hitting a glass with a metal object. After recognizing the sound, the detector switches off the LED indicator for a second.

instructions To be triggered when the system is armed, the detector needs to recognize sounds in the following order: low-frequency sound (hit) , then high-frequency sound (glass shattering, shards). Otherwise, the alarm will not go off.

Switch on/off all the appliances that usually operate in the room: generators, air conditioners, etc. If this triggers the detector, try to change the sensitivity or relocate GlassProtect.

Use the sensitivity level, at which the detector correctly passes both test stages and does not respond to any devices operating in the room.

Installing the device

Selecting the Location

warning In some cases, the household activity can cause false alarms
The location of GlassProtect depends on its remoteness from the hub, and obstacles hindering the radio signal transmission: walls, ge objects inside the room.
warning The device was developed only for indoor use.
warning Check the Jeweller signal level at the installation location
If the signal level is low (one bar), we cannot guarantee the stable operation of the detector. Take all possible measures to improve the quality of the signal. At least, move the detector: even a 20 cm shift can signiove the quality of signal reception.
If the detector has low or unstable signal strength even after moving, use a ReX radio signal range extender
Do not install the detector: 

  1. outside the premises (outdoors);
  2. nearby sirens and speakers;
  3. nearby any metal objects or mirrors causing attenuation or screening of the signal;
  4. at any places with fast air circulation (air fans, open windows or doors);
  5. inside premises with the temperature and humidity beyond the range of permissible limits;
  6. closer than 1 m to the hub.

GlassProtect recognizes glass breaks at a distance of up to 9 meters. Its microphone should be positioned no more than 90 degrees relative to the window(s).
Make sure that any curtains, plants, furniture, or other objects do not overcover the microphone opening.
If there are curtains on the window, place the detector between them and the window, for instance, at the window side jamb. Otherwise, curtains can mute the glass break sound, and the detector will not be triggered.

Detector installation procedure

Before installing the detector, make sure that you have selected the optimal location that follows the guidelines of this manual!

  1. Fix the SmartBracket attachment panel using bundled screws. If you use any other attachment tools, make sure that they do not damage or deform the attachment panel.
    instructions Use double-side adhesive tape only for temporary attachment of the detector. The tape runs dry with time, which can cause falling, false triggering, and detector malfunction.
  2. Put the detector on the attachment panel. When the detector is ed in SmartBracket, it blinks with LED, signaling that the tamper is closed.

If LED doesn’t blink after bracket, check the status of the tamper in the Ajax app and then the If someone detaches the detector from the surface or takes it off the panel.
If someone detaches the detector from the surface or takes it off the attachment panel, the security system notifies.

Connecting a Wired Detector

A wired detector with an NC (normally closed) contact type can be connected to GlassProtect using the in-built terminal clamp.

AJAX GlassProtect Wireless Glass Break Detector- Wired Detector

We recommend installing the wired detector at a distance no longer than 1 meter to GlassProtect. Longer wire length increases the risk of its damage and reduces the quality of communication between the detectors.
To put out the wire from the detector body, break out the plug:

AJAX GlassProtect Wireless Glass Break Detector- Wired Detector 2

If the connected wired detector is triggered, you receive the notification.


Check the operational capability of the detector regularly.
Clean the detector body from dust, spider web, and other contaminants as they appear. Use soft dry napkin suitable for tech equipment.

warning Do not use any substances containing alcohol, acetone, gasoline, and other active solvents to clean the detector.
The pre-installed battery ensures up to 7 years of autonomous operation (with the 5 minutes ping interval by the hub). If the detector battery is low, the system noti, and the LED indicator smoothly lights up and goes off if a glass break is detected or the tamper is triggered.
How long Ajax devices operate on batteries, and what affects this
Battery Replacement

Tech specs

Sensitive element Electret microphone
Glass break detection distance Up to 9 m
Microphone coverage angle 180°
Tamper protection Yes
Frequency band 868.0 – 868.6 MHz or 868.7 – 869.2 MHz depending on the region of sale
Compatibility Operates with all Ajax, hubs range, , extenders Oxbridge Plus uartBridge
Maximum RF output power Up to 20 mW
Radio signal modulation GFSK
Radio signal range Up to 1,000 m (any obstacles absent)
Socket for connecting wire detectors Yes, NC
Power supply 1 battery CR123A, 3 V
Battery life Up to 7 years
Installation method Indoors
Operating temperature range From -10°С to +40°С
Operating humidity Up to 75%
Overall dimensions Ø 20 × 90 mm
Weight 30 g
Certification Security Grade 2, Environmental Class II in conformity with the requirements of EN 50131-1, EN 50131-2-7-1, EN 50131-5-3

Complete Set

  1. GlassProtect
  2. SmartBracket mounting panel
  3. Battery CR123A (pre-installed)
  4. Outside-mounted terminal clamp
  5. Installation kit
  6. Quick Start Guide


Warranty for the “AJAX SYSTEMS MANUFACTURING” LIMITED LIABILITY COMPANY products is valid for 2 years after the purchase and does not apply to the pre-installed battery.

If the device does not work correctly, you should service — in half of the cases, technical issues can be solved remotely!
User Agreement
Technical support: [email protected]

Documents / Resources

AJAX GlassProtect Wireless Glass Break Detector [pdf] User Manual
GlassProtect, Wireless Glass Break Detector
Ajax GlassProtect Wireless glass break detector [pdf] User Manual
GlassProtect, Wireless glass break detector, glass break detector


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