Perimeter beams

Perimeter Beam Calculator

Active infrared beam pairs draw an invisible tripwire along your boundary. Enter the perimeter length, the beam pair’s rated range, the corners and gates, and a weather derate to see how many beam pairs and towers guard the line — and the effective range once fog and monsoon are factored in. Planning figures; runs in your browser.

Perimeter length (m)total boundary to protectBeam pair rated range (m)from the datasheet; outdoor typ. 30–100Cornerseach needs its own aligned pairGatesgaps that break a run

Weather derate (%)fog/rain cut the range — derate generously for the Indian monsoon

Beam pairs

Towers

0.0 m

Eff. range

How the count builds up

Straight-run pairs (perimeter ÷ eff. range)3
Extra for corners (line-of-sight breaks)+ 4
Extra for gates (gaps in the run)+ 1
Total beam pairs8

Stack 2–4 beams per tower so a person cannot crawl under or climb over a single beam. Align each transmitter and receiver precisely, keep the beam path clear of foliage, and give every gate its own detection — a contact or a vehicle loop.

Planning estimate only — rated ranges are line-of-sight maxima that fog, rain and heat-haze cut down, and terrain, slopes and vegetation change what a single beam can actually cover. For life-safety or boundary-dispute lines, confirm the alignment on site and verify against the product datasheet and a site test.

Plan the perimeter line

Active IR beam sensors Boundary intrusion detection Perimeter security guide Assess your perimeter

Related Guides — Deep-dive reading

Perimeter Beam Sensors in India (2026): Invisible Trip-Lines Along the Boundary

How stacked active-infrared and laser photo-beams strung between towers along a wall, gap or long straight run raise the alarm the moment someone crosses the boundary — and how to place them so fog, birds and foliage do not.

Security

Beam Sensors in India (2026): Active-Infrared Perimeter Detection for Gates, Walls and Farmhouse Boundaries

How active-infrared beam sensors work, where they earn their place on Indian plots, single-beam versus multi-beam towers, and how to tame the outdoor false-alarm problem with sound design.

Security

Perimeter Alarm Systems in India (2026): Detect an Intruder at the Boundary

How an outer detection layer — outdoor motion sensors, beam barriers, fence and wall-top sensors and gate contacts — warns you the moment someone crosses your compound wall, and how to design it for Indian weather without endless false alarms.

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