Ajax GlassProtect U Jeweller | Wireless Glass Break Detector, 9m Range | Regional Compliance (U-Series)

FAQs

What is the maximum detection range of the GlassProtect U Jeweller?

The GlassProtect U Jeweller can detect glass breaking at distances of up to 9 metres from the device. The detector features a 180-degree horizontal detection angle, providing comprehensive coverage for multiple windows or glazed areas within its range. For optimal performance, the detector should be positioned at an angle of up to 90 degrees relative to the protected windows.

How does the DualTone algorithm prevent false alarms?

The DualTone algorithm is a sophisticated two-stage verification system that requires detection of both a dull low-frequency sound (impact) and a ringing high-frequency sound (glass fragments falling) within a 1.5-second window. This dual verification eliminates false alarms from common household noises such as barking dogs, passing vehicles, door slams, or other ambient sounds that don’t match the specific acoustic signature of breaking glass.

Can the GlassProtect U Jeweller detect breaking of film-covered glass?

No, the GlassProtect U Jeweller does not respond to breaking of film-covered glass, including shockproof film, sunscreen film, decorative film, or any other type of protective film. For protecting film-covered windows, Ajax recommends using the Superior DoorProtect Plus Jeweller wireless opening detector, which is equipped with shock and tilt sensors specifically designed to detect the breaking of such glass types.

What is the battery life of the GlassProtect U Jeweller?

The GlassProtect U Jeweller operates on a pre-installed CR123A battery that provides up to 7 years of autonomous operation when using the default 5-minute polling interval. When the battery level becomes low, the system automatically notifies users through the Ajax app, and the LED indicator will smoothly light up and fade when glass break is detected or the tamper is triggered, providing advance warning for battery replacement.

Can I connect an additional wired detector to the GlassProtect U Jeweller?

Yes, the GlassProtect U Jeweller includes a built-in terminal clamp connector that allows you to connect a third-party wired detector with NC (normally closed) contact type. Ajax recommends installing the wired detector at a distance no longer than 1 metre from the GlassProtect U Jeweller to maintain optimal communication quality. You must enable the External Contact option in the device settings for the connected detector to function.

What is the wireless communication range of the GlassProtect U Jeweller?

The GlassProtect U Jeweller uses Ajax’s Jeweller wireless protocol and can communicate with Ajax hubs at distances up to 1,000 metres in open space. The actual range depends on the building construction, presence of walls, metal objects, and other RF interference. The Ajax app displays real-time signal strength, and Ajax recommends installation locations with 2-3 signal bars for reliable operation. ReX or ReX 2 range extenders can be used to extend coverage in larger installations.

How do I test if the GlassProtect U Jeweller is working correctly?

The Ajax app provides a dedicated Detection Zone Test mode. During testing, hit the glass with your fist without breaking it – if the detector catches the low-frequency sound, the LED lights up. Then simulate high-frequency glass shattering within 1.5 seconds using a special tool or by tapping glass with a metal object. After recognizing both sounds in sequence, the detector will confirm successful detection. The device also offers Jeweller Signal Strength Test and Signal Attenuation Test modes for installation verification.

Can the GlassProtect U Jeweller be used outdoors?

No, the GlassProtect U Jeweller is designed exclusively for indoor use only. Installing the detector outdoors can lead to false alarms and device failure due to exposure to weather conditions, temperature extremes, and environmental factors. The device operates within a temperature range of -10°C to +40°C and humidity up to 75%, which is suitable for indoor environments but not for outdoor exposure.