Perimeter protection — a camera that notices, warns and keeps the evidence
Dahua's perimeter protection solution is for places where the fence or the plot boundary is the first and often only line of defence: a factory site, a building site, an apartment yard, a school, a hotel. The camera is not there to look at afterwards, but to intervene at the moment someone crosses the line — with light, voice and a message to the guard.
Three problems it solves
| Problem | As Dahua puts it | Solution |
|---|---|---|
| No round-the-clock surveillance | lacking 24/7 surveillance leads to theft, property damage and trespassing | AI detection that tells a person or vehicle from an animal, leaves and snow — 99% accuracy and under 1% false alarms, according to Dahua |
| Slow response | distant or physically limited guards let threats escalate, blind spots hide incidents | the camera reacts itself, immediately: red-and-blue strobe and a voice warning from a 120 dB siren, with a notification to the guard at the same time |
| No evidence | without a recording an insurance claim is hard to file | HD recording of the event from start to finish, searchable by event type |
What is in the solution
The core is the TiOC camera (Three-in-One Camera): full-colour night view, active deterrence and AI detection in one housing. The perimeter rule is drawn on the picture — a line or an area — and the camera reacts only to a person or vehicle crossing it. The housing is IP67 and works from −30 to +60 °C. WizSense support in the recorder lets you later search only for "person crossed the line" events instead of scrolling through hours of empty picture.
Dahua's recommended kit and our stock:
TiOC bullet cameras IPC-HFW3x49T1-AS-PV (PRO and 3.0) — in stock; for fences and boundaries, 30–60 m illumination, also in black for dark fencing.
TiOC turret cameras IPC-HDW3849H-AS-PV — in stock; under the eaves and in the yard, the same deterrence in a smaller housing.
Recorders NVR4208-EI and NVR5216-EI — in stock; 8 or 16 cameras, AI search by event.
Also from our shelf: the PFR5QI-E60 radar camera (60 GHz radar sees 60 m even in fog) and, below, the Multivision Triple-Sight perimeter camera.
For a long fence: one camera with three lenses
A real-life example: a building site with no night guard
Four TiOC bullet cameras at the fence corners, rule "person crosses the fence line" from 19:00 to 06:00. If someone climbs the fence at night the strobe lights up and the camera says out loud that the area is monitored and recorded — most leave at that. The site manager gets a clip on their phone and decides whether to call the security company. Material theft stopped in the first month; the same recording was enough for the insurer in two later claims.A real-life example: a factory site with 300 m of fence
A Multivision Triple-Sight camera every ~100 m on the long straight sections, TiOC PRO bullets and turrets at the corners and in the yard. Three rules: the fence line, the warehouse door area and the car park. The guard no longer watches 16 pictures at once — only the events where someone really crossed a line arrive, and it is immediately clear whether it was an employee on a smoke break or a stranger.How to start
- Walk the boundary and measure the sections — a sensible perimeter section for one TiOC camera is 30–50 m; the camera count follows from that.
- Decide what counts as an intrusion — crossing a line, entering an area, or lingering in it. The rule determines how early the camera reacts.
- Decide who gets the notification — a phone, a guard desk or a security company. The camera deters by itself, but someone also has to respond.
Source: Dahua Technology, "Perimeter Protection" solution page (dahuasecurity.com, solutions / SMB solutions), read 17 Sep 2026. Product details: Dahua datasheets.
