How many beam barrier pairs do I need to protect a fence line?

Divide the perimeter length by the effective range of your chosen beam product (typically 30 m for wireless SL-TNR, 100-200 m for wired twin-beam, 650 m for quad-beam). Outdoor installs derate ~30% from rated range for rain/fog margin. A 120 m fence usually needs 1-2 pairs of SL-100Q twin-beam, or 1 pair of SL-200QN.

What's the difference between twin-beam and quad-beam barriers?

Twin-beam barriers stack 2 IR beams vertically — both must trip simultaneously to alarm, eliminating false triggers from birds, leaves, and small animals. Quad-beam stacks 4 beams (typical 0.4/0.8/1.2/1.6 m heights), making it nearly impossible to crawl under or climb over without breaking the beam plane. Use quad-beam for high-security or estate perimeters.

Should I use wireless or wired beam barriers?

Wireless (Optex SL-TNR) is battery-operated and ideal for retrofit, where running cable would be expensive or destructive (existing fences, listed buildings, large gardens). Wired beams have unlimited runtime, faster response, and integrate directly into the alarm panel — preferred for new builds and high-value sites where battery maintenance is a liability.

Can I use beam barriers indoors?

Yes — indoor beam barriers excel in corridors, warehouse aisles, museum displays, and any narrow choke-point where you want a 'tripwire' detection line that ignores movement on either side. Indoor ranges hold to rated spec (no weather derating needed). For valuable items, install at multiple heights (low beam + waist + chest) to detect crawling and crouching.

How far apart should I space beam barrier pairs along a long perimeter?

Space pairs so they meet at posts/columns of your fence (typically every 30, 50, or 100 m depending on which product tier you pick). Overlap zones by ~10% at each junction so a strong fog patch or one failed unit doesn't open a gap. For perimeters over 500 m, use the SL-650QFR which provides full coverage with one pair per segment.

Calculadora de barreras de haz

Planifique la cobertura del haz IR perimetral: doble o cuádruple, con cable o inalámbrico, con selección automática de productos del catálogo de Optex.

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Perímetro para proteger: 120 m

Ambiente

Las gamas de tiro para exteriores reducen su potencia en aproximadamente un 30 % con respecto a la potencia máxima nominal para garantizar un margen de fiabilidad en caso de lluvia o niebla.

Solicitud

Nivel de seguridad

Sistema de doble haz y lógica AND: elimina las falsas alarmas provocadas por aves y fenómenos meteorológicos.

Configuración recomendada

Se necesitan pares de haces

12 unidades totales (TX + RX) para 120 m de perímetro a ~ 21 m efectivo por par.

Producto recomendado

Optex SL-TNR (wireless)

Battery-operated, easy retrofit, no cabling

Clasificación 30 m · efectivo 21 m después de 30% reducción de clasificación en exteriores

Presupuesto de equipos y cables

€2,100

Equipo € 2100 + cable y terminaciones € 0 (0 m de 4 conductores)

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En el diseñador, coloque los pares TX/RX en el perímetro; observe las zonas de superposición y los huecos antes de pedir el hardware.

Calculadora de barreras de haz

Configuración recomendada

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