Indoor detection confirms presence after entry; perimeter protection aims to alert earlier at a fence, façade or opening. Outdoors provides time but faces more weather and activity. Combine physical measures, a targeted perimeter and reliable indoor detection.
Key points
- Start with likely access paths.
- Use outdoor detection in controlled areas.
- Retain independent indoor detection.
- Link early alerts to verification.
Three layers
Organisation and physical protection delay, the perimeter alerts early and indoor detection confirms.
Each layer has a distinct function and limitation.
- Organisation
- Physical
- Perimeter
- Indoor
- Verification
Indoor as a stable base
Contacts and motion sensors work in predictable environments with clear zones.
They report during or after entry.
- Stable
- Clear
- Cost-effective
- Later alert
Outdoor early warning
Beams, fence sensors, outdoor detectors and video analytics protect boundaries and approaches.
Weather, plants, animals and legitimate traffic require care.
| Layer | Time | Benefit | Watch for |
|---|---|---|---|
| Boundary | Early | Response time | Weather |
| Opening | At opening | Precise | Installation |
| Indoor | After entry | Stable | Later |
| Video | Context | Visual | Light and privacy |
Choose outdoor areas
Avoid pavements and moving trees; select rear access, closed loading areas and paths.
Use schedules and exceptions.
- Rear access
- Loading area
- Outdoor stock
- Path
Verify safely
Combine a second sensor, relevant image or event sequence.
Do not send staff or neighbours into potential danger.
- Second signal
- Camera
- Recipient
- Safe action
- Log
By building type
Homes often start with contacts and night mode; shops protect glazing and stock.
Larger sites combine fence, yard, doors and indoor routes.
- Home
- Retail
- Warehouse
- Industry
Test and maintain
Test weather, night, authorised movement and boundary paths.
Maintain alignment, vegetation, batteries and radio.
- Weather
- Routes
- Alignment
- Plants
- Log
FAQ
Does outdoor detection replace indoor detection?
No. It adds an earlier independent layer.
Can an entire garden be covered?
Targeted paths are usually more reliable.
Is AI video enough?
Not always; weather and occlusion support additional verification.
What works at night in a home?
Opening contacts often allow safe movement inside.
