Outdoor Beams Installation adds perimeter detection to an alarm, so it triggers while an intruder is still in the garden or yard instead of at the door. It suits freestanding homes, smallholdings and businesses with yards.
- Describe the yard: walls, gates, driveways, pools and garden beds.
- Mention dogs that roam outside at night.
- Say what alarm brand you have, if any.
Describe your yard once and compare outdoor beam quotes.
Get Outdoor Beam QuotesTypes of Outdoor Detection
"Beams" is used loosely in South Africa for any outdoor detector. They work differently, so the right one depends on the area being covered.
| Detector | How it works | Suits |
|---|---|---|
| Point-to-point beams | A transmitter and receiver on posts or walls. An alarm triggers when an infrared beam is broken. | Straight runs along walls, driveways and side passages |
| Outdoor motion detectors | Passive infrared, sometimes with microwave, watching an area for body heat and movement. | Gardens, patios and open yards |
| Curtain detectors | A narrow detection pattern down a wall or across windows. | Protecting a wall of windows or a facade |
| Detectors with cameras | Some wireless outdoor detectors take a photo or video when triggered. | Verifying alarms before response |
Placement and False-Alarm Reduction
- Vegetation: moving branches and long grass trigger outdoor detectors. Plan for trimming.
- Pets: beams mounted above dog height, stacked beams or pet-immune outdoor detectors help, but large dogs remain a challenge.
- Weather: direct sun, heavy rain, mist and dust affect sensors. Hoods and correct angles reduce this.
- Alignment: point-to-point beams must stay aligned. Posts that move in the wind cause faults.
- Zoning: each beam or area on its own zone makes it clear where a trigger happened.
Outdoor detectors need more upkeep than indoor ones. Plan for alarm maintenance.
What Installation Includes
- A walk-through to choose detector types and positions.
- Mounting posts or brackets, and cabling or wireless pairing.
- Connecting zones to the panel or a zone expander.
- Aligning beams and setting detection ranges.
- Walk-testing and adjusting to cut false triggers.
Outdoor Beam Prices
| Item | Ballpark price |
|---|---|
| Point-to-point outdoor beams, equipment only (budget to Optex 60 m) | R760 - R2,270 |
| Wireless outdoor beam, 30 m | About R3,830 |
| Outdoor beams, installation per pair | R1,500 - R2,500 |
| Outdoor motion detector, wired | R1,980 - R2,540 |
| Outdoor motion detector, wireless | R2,700 - R4,480 |
Ballpark figures, not quotations. Compiled from prices published by South African suppliers, retailers, installers and security companies, checked October 2026 and rounded. They are not our prices and no provider is bound by them. Equipment-only prices exclude installation. Some guide figures come from installer marketing pages and are less reliable than retailer prices. Confirm whether VAT is included on every quote.
Sources:
- Alarmtec online store, alarm kits, detectors, beams, batteries and Ajax ranges, prices including VAT (checked October 2026)
- Security Junxion, Optex AX-200TN beams, price including VAT (checked October 2026)
- PriceCheck retailer listings for IDS, Hikvision AX PRO, Ajax, Optex and battery products (listings seen September - October 2026, VAT not stated)
- The Handyman Johannesburg, security installation prices (15 January 2026, VAT not stated)
- Procompare, home alarm system, outdoor beams and security company price guides (2026, VAT not stated)
- CCTV Direct, Takex outdoor detectors (checked October 2026)
What Affects the Cost
- Length of the perimeter and number of beam pairs.
- Wired or wireless outdoor units.
- Posts, brackets and trenching.
- Spare zones on the panel, or a zone expander.
- Brand and detection technology.
More ranges are on the alarm system prices guide.
What to Include in Your Request
- Town or suburb.
- Property type and rough yard size.
- Which sides to protect.
- Pets outside at night.
- Alarm brand and spare zones, if known.
- Never send alarm codes, app passwords or master PINs in a quote request. A provider will set or change these with you on site.
How the Enquiry Works
- Request. Describe the yard.
- Match. Independent installers that may serve your area can respond.
- Site visit. Outdoor detection is almost always quoted after a visit.
- Compare. Check detector types, positions and how false alarms are handled.
- Install. Agree a period for adjustments after installation.
Request quotes from providers serving your area. Availability depends on your location and service requirements.
Outdoor beams can be quoted with a new system or added later. Compare options through Alarm Systems South Africa.
Outdoor Beams FAQs
Will my dogs set off outdoor beams?
They can. Beams mounted above dog height, stacked beams and pet-immune outdoor detectors reduce it, but large or jumping dogs remain a risk. Tell installers about your pets.
Are outdoor beams better than indoor detectors?
They do a different job. Outdoor detection gives earlier warning, indoor detection confirms someone is inside. Most systems use both.
Can beams be added to my existing alarm?
Usually, if the panel has spare zones or can take a zone expander or wireless receiver.
Why do outdoor beams cause false alarms?
Plants, animals, sun, rain and misalignment. Good placement, the right detector type and regular cleaning reduce them.
Do outdoor beams work at night?
Yes. Infrared beams and passive infrared detectors do not need light.
Related Services
Alarm Systems South Africa is a free quote-comparison service. Alarms are supplied, installed, repaired, monitored and responded to by independent providers, and your agreement is with the provider you appoint. Before you pay, ask each one for a written quote listing equipment, labour, warranty and any contract or cancellation terms.
Outdoor Beams Installation. Describe your yard and compare quotes.
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