A site that raises the alarm is good. One that defends itself is something else entirely.
Construction sites, site cabins, warehouses, loading docks, depots: this page is here to give honest answers to a site manager's or operations manager's questions. Does this sound shield belong on your sites? How does it run without power or a network? And how does it move with your projects?
“A site cabin at the weekend, a depot between two patrols: those are the places I saw broken into again and again. They are the reason we designed a device that needs no power, no network and no one on site.” Cédric Fontaine, founder of Lima Groupe
An award-winning French innovation: Audience Award, La Nuit de la Sécurité Globale (Républik Group). Figures and facts verified in September 2026.
The figures below come from trade federations, the construction press and insurers. They all concern the same thing: what happens when someone enters a closed site at night or at the weekend.
Theft and vandalism cost the building industry nearly 2 billion euros a year.Fédération Française du Bâtiment
Behind that figure, four facts that describe everyday life on sites left unattended at night and at weekends.
These figures come from trade federations. The cases below come from the construction press and the regional press, over the last twelve months.
“Construction machinery thefts have doubled, threatening some building and civil engineering companies with bankruptcy.”
Le Moniteur, 2025“Theft and vandalism on construction sites are a concern”: the construction federation fights a scourge estimated at 44 million euros a year in a single region.
France 3 Occitanie7 in 10 companies hit by equipment theft on their sites: up 36% in two years.
Construction BTP, 2025Nearly 2 billion euros in annual losses for the building industry.
Fédération Française du BâtimentWarehouses and logistics hubs broken into at night: single incidents running into hundreds of thousands of euros.
Transport insurersBurglaries of industrial and commercial premises rising sharply.
Ministry of the Interior (SSMSI)What they have in common: sites empty at night and at weekends, often with no power or network, that people break into to steal, cut up or wreck. And that is exactly where conventional protection ends.
Two nights and two days with nobody there. The materials yard, the tool containers, the diesel tank, the site cabin. Monday, 6:30 a.m.: the padlock is cut, the diesel siphoned, the cables gone, the mini-excavator missing. The site grinds to a halt, the claim begins, and so do the delay penalties. Nobody saw a thing, and nothing took action.
With a LIMA SHIELD in the container and another pointed at the yard, the same scene is cut short: local thermal detection, warning beeps, then a sound of 86 to 138 decibels makes the area unbearable, and the site manager is alerted over 4G, even without broadband, even without Wi-Fi. The uninvited guests leave empty-handed, and work resumes on Monday as planned.
You manage changing sites, tight budgets and firm deadlines. So let us be clear from the start about when LIMA SHIELD is the right investment, and when it is not.
A demonstration gives you a precise costing: how many units, in which zones, and how they rotate from one site to the next as you hand over each project.
This is what sets your sector apart, and the device is built for it. LIMA SHIELD is set up in 5 to 10 minutes, on a free-standing base or wall bracket, travels in a rugged case, and starts up on the next site as quickly as it left the last. Buy a unit once and it protects every site it moves to for 10 years.
Shields are paired in the mobile app, Lima Shield Connect, so every site can be seen, armed and controlled remotely, and the alert goes to the site manager, the depot manager or the on-call team, by notification.
1. Disarmed: the site is working as normal. 2. Armed: when the site closes, it monitors: intrusion confirmed, warning beeps, time delay, emission. 3. Triggered: emission in progress, the sound alternating with pauses, can be switched off at any time. Manual triggering is also available: panic button, remote control, app, even when the device is not armed. Tamper protection guards the unit itself: any attempt to rip it off triggers the deterrent.
You keep your mobile cameras, your remote site monitoring, your patrols: LIMA SHIELD adds the active layer to the zones that matter. It is AND, not OR.
In other words, nothing to replace in your organisation. Your patrols, cameras and contracts keep their roles; LIMA SHIELD holds the zones during the quiet hours.
A French sound shield, winner of the Audience Award at the Nuit de la Sécurité Globale (Républik Group). When an intrusion is confirmed, it warns the intruder with a sequence of beeps, then emits a sound of 86 to 138 decibels, calibrated to the 2 to 5 kHz band and modulated to prevent any habituation: the area becomes unbearable and triggers the reflex to flee. Without contact, without substances, without confrontation, and the sound fills large spaces, reflections included.
Behind the unit: a French startup, co-founders from the army and the police, engineers, some of them formerly at Dassault, nearly €1 million in research and development, prototypes built in Strasbourg, and compliance with European CE standards.
“A breakthrough innovation in security.” Le Figaro, July 2026
Warehouses, car dealerships, jewellers, tobacconists, town halls and police stations are already among the first customers and pre-orders.
It is a professional instrument, drawn from research originally developed for institutional use, then specifically designed and regulated for civilian use, and that origin is what guarantees its regulated use. Think of it as the device that takes over once the alarm has done its job, that only acts on a confirmed intrusion, and whose every activation is regulated: warning beeps, time delay, automatic shut-off.
| Solution | Type | During the intrusion | In practice? |
|---|---|---|---|
| Conventional alarm | Passive: detects and alerts | The siren sounds | Not much happens: noise, then waiting. |
| Site cameras | Passive: sees and records | Records the scene | You get the information. Nothing more. |
| Remote monitoring | Passive: alerts and dispatches a response | Delayed response | Decent, but response times are still long. |
| Security fog | Active: conceals property | Fills the space with fog | Effective once. Open a window and it is gone. |
| Strobe light | Active: visual disruption | Flashes of light | A real impact, but highly variable. |
| Security guarding | Active: human presence | Depends on where the patrol is | Very effective, but expensive. |
| LIMA SHIELD | Active: makes intruders flee | Warning, then sound saturation | Very effective, and inexpensive. |
Ultimately, the best security set-ups are combinations: detection, footage, a response team... and a device able to act on its own. LIMA SHIELD is the missing piece in your set-up.
Let us do the maths for an operator. A theft on site is not just the equipment: it is the site at a standstill, emergency replacement rentals, delay penalties, the excess, the higher premium, and single incidents running into tens, sometimes hundreds of thousands of euros at logistics hubs. Then the tug-of-war with the insurer to get paid.
And then there is what no claim form covers: crews demotivated by finding the container broken into every other Monday, and customers left waiting. It is not just equipment you lose: it is deadlines, and the trust that goes with them.
Set against that, LIMA SHIELD costs €2,500 excl. VAT per unit, once, with no subscription. An investment, not an expense: the unit can be redeployed and pays for itself across every site it follows over its 10-year lifespan, roughly 68 cents a day per zone held. And we carry the long-term risk: 2-year manufacturer's warranty, battery excluded.
Manufacturer's warranty: 2 years. For 2 years, if your LIMA SHIELD develops a defect or a fault, we repair or replace it. Only the battery, a wear part, is excluded. Simply contact our support: a team based in France diagnoses the issue with you and arranges the repair or replacement. Beyond these 2 years, the device is designed to last 10 years.
Number of zones, pairing, rotation between sites: a security expert builds the plan with you. LIMA SHIELD is produced in limited runs and is regularly out of stock.
Order LIMA SHIELDcheck availability Request a demonstrationwith a security expertYes, this is exactly what it is built for: detection and triggering are local and need no network. The internal battery lasts 1 month on standby, and up to 3 months with the plug-in secondary batteries. Alerts go through the built-in 4G.
The unit is IP54 certified, resistant to dust and water splashes: it is freestanding or wall-mounted, for indoor and sheltered semi-outdoor areas (container, site cabin, canopy, covered dock), with an optional impact-resistant enclosure. Only direct, permanent exposure to the weather should be avoided.
Any attempt to tear it off or tamper with it triggers the tamper protection: the deterrent goes off on its own. Indoors, the source is also very hard to locate: the unit defends itself better than what it protects.
Think in terms of zones to hold: one unit covers up to 100 m² and is placed where value is concentrated: container, site cabin, dock, storeroom. Most sites are covered by a handful of paired units. A security expert prices up the exact plan with you.
Dismantling and reassembly in 5 to 10 minutes, transport in a rugged case, reconfiguration from the app via Bluetooth. The unit follows your sites, and the app follows the unit.
Yes. For indoor use, no French law known to date caps the power of an acoustic deterrent device, and LIMA SHIELD is CE compliant. Its activation in the event of an intrusion falls within the legitimate defence of property (article 122-5 of the Code pénal, the French Criminal Code), with warning, time delay and automatic shut-off. For staff, the time delay and badge disarming keep everyday use under control.