Glass Break Sensor Installation in Leicester
We install acoustic glass break sensors that detect the specific sound signature of breaking glass and trigger an immediate response. Every sensor is PoE-powered and hardwired - no batteries, no wireless interference, and no cloud dependency. Glass break sensors fill the gap that entry sensors cannot cover: an intruder smashing a window rather than opening it.
By the Doberman install team · CCTV system designers & installers, Leicester · Last reviewed February 2026
By the Doberman install team
CCTV system designers & installers, Leicester
Last reviewed February 2026
What you get
Glazing assessment and sensor placement
We assess every window and glass door on your property, identify which areas are vulnerable, and specify sensor positions to cover the glazing that matters.
PoE-powered acoustic sensor installation
Each sensor is hardwired over Cat5e or Cat6 back to your PoE switch. One cable for power and data. No batteries to die and no wireless signal to fail.
Acoustic calibration
Sensors are tuned during installation to distinguish actual glass breakage from other loud noises - thunder, slamming doors, balls hitting windows. Reliable detection without false alarms.
Alert and siren integration
Glass break events trigger push notifications, camera recordings, and siren activation. You get the alert before the intruder is inside the property.
How it works
Survey
We identify every vulnerable window and glass door, assess the room layout and acoustics, and specify sensor count and positions to provide full coverage.
Install
Sensors mounted on walls or ceilings within acoustic range of the glazing they are protecting. Cables run through lofts, cavities, and conduit for a clean installation.
Calibrate
Each sensor is tested and tuned to the acoustic environment of the room. Sensitivity adjusted so the sensor reliably detects glass breakage without triggering on ambient noise.
How acoustic glass break sensors work
An acoustic glass break sensor listens for the specific frequency pattern produced when glass shatters. The sound of breaking glass has a distinct two-part signature - a low-frequency thud from the initial impact followed by a high-frequency shatter as the glass fractures. The sensor analyses incoming sound for this specific pattern and only triggers when both components are present. A single loud bang, a heavy bass note from a speaker, or a door slamming will not produce the right frequency signature to activate the sensor.
The sensors we install use dual-technology detection that combines acoustic analysis with pressure wave sensing. This means the sensor needs to detect both the sound pattern and the physical pressure wave created by the glass breaking. It is significantly more reliable than single-technology acoustic sensors, which are more prone to false triggering from loud noises in similar frequency ranges.
Where glass break sensors add the most value
Ground-floor windows and glass doors are the primary application. Conservatories, patio doors, bi-fold doors, and large bay windows are all vulnerable to smash entry - and none of them are covered by a magnetic entry sensor when the intruder breaks the glass rather than opening the door. A glass break sensor detects the breach the moment the glass gives way, before the intruder has climbed through.
For commercial properties in Leicester - shop fronts, restaurants with floor-to-ceiling glazing, offices with glass entrance doors - glass break sensors are particularly valuable. A shop window is often the primary entry point for a smash-and-grab break-in. The sensor triggers the siren and camera recording within seconds, giving you the earliest possible alert and the best chance of capturing usable footage. Upstairs windows are generally lower risk unless the property has flat roofs, fire escapes, or adjacent structures that provide access.
Glass break sensors vs entry sensors
Entry sensors and glass break sensors cover different attack methods. An entry sensor detects an opening being used normally - the door handle is turned, the window latch is released, and the two sensor halves separate. It does not trigger if the glass is smashed while the frame stays closed. A glass break sensor detects the destruction of the glass itself, regardless of whether the frame moves.
For comprehensive perimeter coverage, you need both. Entry sensors on every door and openable window, plus glass break sensors covering fixed glazing and any window large enough to climb through if the glass is broken. The two sensor types work together - entry sensors catch the quiet intrusion (picking a lock, forcing a latch), while glass break sensors catch the violent entry. For details on how we install and configure entry sensors alongside glass break detection, see our motion and environment sensors for the broader smart sensor range we offer.
Reducing false alarms
False alarms are the biggest problem with any acoustic sensor. A sensor that triggers when someone drops a glass in the kitchen or when thunder rolls overhead trains you to ignore it - which defeats the purpose entirely. The dual-technology detection in the sensors we install significantly reduces false triggers by requiring both the acoustic signature and the pressure wave. But the installation matters just as much as the hardware.
We calibrate each sensor to the specific room it is protecting. A small bathroom with hard tiled surfaces reflects sound differently from a large living room with soft furnishings. Sensor sensitivity is adjusted during installation to account for the room acoustics, the distance from the glazing, and the ambient noise level. We test with simulated glass break sounds to verify detection and with common nuisance noises to confirm the sensor ignores them. The result is a sensor that triggers when glass actually breaks and stays quiet the rest of the time.
Glass break sensor installation across Leicester
Doberman installs acoustic glass break sensors for homes and businesses across Leicester and Leicestershire. Whether you need coverage for a conservatory in Oadby, a shop front on Granby Street, or patio doors in a new build in Thorpe Astley, the approach is the same - we survey, specify, install, and calibrate everything ourselves. For a complete overview of our smart security and sensor range, visit our full home automation service.
Pricing
Glass break sensor costs depend on the number of sensors, the area of glazing being covered, and cable run lengths. All sensors are supplied, installed, and calibrated as part of the service. We provide a fixed quote after the site survey.
Why Doberman
Dual-technology detection
Acoustic analysis plus pressure wave sensing. The sensor needs both signatures to trigger, which virtually eliminates false alarms from everyday noises.
Hardwired PoE, no batteries
Every sensor runs on Power over Ethernet. No battery changes, no wireless dropouts, no signal range limits. Reliable detection 24/7.
Calibrated to your rooms
Each sensor is tuned during installation for the specific acoustics of the room it protects. Factory defaults are overridden with real-world settings.
Pre-entry detection
The sensor triggers the moment the glass breaks - before the intruder is inside. This gives you the earliest possible alert and starts camera recording immediately.
About Doberman
Doberman is a Leicester-based security installer specialising in hardwired PoE systems for homes and businesses. We install CCTV cameras, sensors, and sirens - all running on the same Ethernet infrastructure for maximum reliability.
Glass break sensors are part of our wider smart security range. We install them alongside entry sensors, motion detectors, environmental monitors, and PoE sirens to build layered security systems that detect, alert, and deter. Our installation guides cover the technical detail if you want to understand our approach.
Areas we cover
We install glass break sensors across Leicester city and the surrounding areas, including Clarendon Park, Stoneygate, Oadby, Wigston, Braunstone, Hamilton, Thorpe Astley, Glenfield, Groby, Coalville, Market Harborough, Hinckley, Loughborough, and everywhere in between.
Frequently asked questions
- How far from the window does the sensor need to be?
- Most acoustic glass break sensors cover a radius of four to six metres from the mounting point. One sensor on a wall or ceiling can typically cover all the glazing in a standard room. Larger rooms or rooms with unusual layouts may need two sensors for full coverage.
- Will the sensor trigger if a glass is dropped in the kitchen?
- No. The dual-technology detection requires both the specific acoustic signature of window glass breaking and the associated pressure wave. A dropped drinking glass does not produce the same frequency pattern or pressure change as a window pane shattering.
- Do glass break sensors work on double glazing?
- Yes. Double-glazed and laminated glass both produce detectable acoustic signatures when broken. The sensor is calibrated for the type of glazing during installation. Laminated glass produces a slightly different sound profile because it holds together rather than shattering completely, and the sensor is tuned to detect both types.
- Can a glass break sensor trigger my siren and cameras?
- Yes. When the sensor detects a glass break event, it can simultaneously activate a siren, start recording on the nearest camera, and send a push notification to your phone. All of this happens within seconds over the local PoE network.
- Do I need glass break sensors if I already have entry sensors?
- Entry sensors detect doors and windows being opened. They do not trigger if the glass is smashed while the frame stays closed. If your property has vulnerable glazing - ground-floor windows, patio doors, conservatories - glass break sensors cover the attack method that entry sensors miss.
- How many glass break sensors does a typical home need?
- A typical Leicester home needs one to three glass break sensors covering the main vulnerable areas - living room bay window, patio or bi-fold doors, and conservatory. Each sensor covers a radius of four to six metres, so one per room is usually sufficient. We specify the exact count during the site survey.