Dual Beam Infrared Sensor – 250 Meter Outdoor Perimeter Alarm (IP55)

Description

The Dual Beam Infrared Sensor – 250 Meter is a high-performance perimeter security solution designed for large-scale and high-security areas.

This long-range detector uses dual infrared beams to ensure reliable intrusion detection while minimizing false triggers from weather conditions, animals, or environmental disturbances.

With its IP55 waterproof rating and anti-interference technology, the system delivers consistent performance in rain, dust, heat, and harsh outdoor conditions.

The 250m detection range makes it ideal for securing large properties such as factories, warehouses, campuses, farms, and industrial zones.

It is compatible with most alarm control panels and security systems, providing complete and professional-grade perimeter protection.

📦 Package Includes

1 × Dual Beam Infrared Sensor (Transmitter + Receiver) – 250m

Mounting Brackets

Installation Screws

User / Wiring Guide

Who this sensor is for. Perimeter beam sensors protect boundaries rather than rooms. They suit factory and mill walls, farmhouse and plot boundaries, warehouse yards, school compounds, and the boundary walls of larger residences. The value of protecting a boundary is time: you learn that someone has crossed your line while they are still outside the building, rather than after they have reached a door or window. For properties with open land around them, that early warning is the whole point.

How dual beam reduces false alarms. A dual beam design requires both beams to be interrupted simultaneously before it triggers. That single decision is what stops birds, falling leaves, blowing plastic, and stray cats from setting off your alarm every night, which is the most common complaint with cheaper single beam units. This matters more in Pakistan than in many markets, because street animals near boundary walls are simply a fact of life. A system that cries wolf nightly gets switched off within a fortnight, so false alarm immunity is not a luxury feature, it is what determines whether the system stays in use.

Understanding the 250 metre rating honestly. The quoted range is a maximum measured under clear outdoor conditions. Real installations should allow a comfortable margin, because fog, heavy dust, smoke, and monsoon rain all reduce effective range. As a working rule, design to a useful fraction of the rated distance rather than the headline figure, and you will get reliable year round performance. A pair pushed to its absolute limit will work beautifully in March and behave unpredictably in July.

Alignment matters more than the specification. The transmitter and receiver must face each other accurately. Most reliability complaints trace back to alignment rather than the sensor. Mount both units on solid, stable posts or masonry pillars, never on a fence panel, a gate that moves, or a thin bracket that flexes in wind. Once aligned, check again after a few weeks and after any storm, since a post that shifts even slightly over a long span throws the beam off. Give yourself a way to reach the units for occasional cleaning and realignment.

Mounting height and defeating the system. Beams mounted too high can be crawled under; mounted too low they are triggered by animals and undergrowth. Many installations use a stacked arrangement so the protected band is harder to pass through. Consider what someone would actually do to get past your specific layout and mount accordingly. Position units so foliage will not grow into the path, and plan for seasonal plant growth rather than only what is there on installation day.

Weather protection. The IP55 rating means the housing is built to resist dust ingress and water spray, which suits open boundary installation through monsoon rain and dusty summer months. Even so, a small canopy or positioning under an overhang extends life and reduces how often the lenses need cleaning. Dirty lenses are the second most common cause of unreliable operation after alignment, and both are maintenance issues rather than faults.

Calculating how many pairs you need. One pair covers one straight line. A rectangular plot needs a pair per side, so four pairs, not one. An L shaped or irregular boundary needs a pair per straight run. Corners are where planning usually goes wrong, because a beam cannot bend. Send us your boundary layout with approximate dimensions and we will calculate pairs and positions properly rather than leaving you to discover a gap after installation.

Connecting it to your alarm system. The sensor provides an output that must go somewhere useful. Most installations wire it into an existing burglar alarm panel so a beam break triggers the same siren, strobe, and notification as a door contact would. It can equally drive a siren directly, trigger a dialler, or switch on lighting. Wire it as normally closed where possible, so that cutting the cable also triggers the alarm rather than silently disabling it. ZZ Marts stocks the panels, sirens, diallers, and cabling required to complete the installation.

Power supply and load shedding. The beams need continuous power to work, so plan a backup supply. Without one, your perimeter protection is absent during exactly the outage periods when it may matter most. A modest battery backup at the panel usually covers both the beams and the alarm through typical load shedding.

Cabling across a boundary. Long cable runs to remote corners of a plot need proper conduit and adequate conductor size, and should be planned before civil work rather than retrofitted across a finished compound. Where trenching is impractical, discuss the layout with us and we can suggest an approach.

Will it work on an L shaped boundary? You need a pair per straight run. Send us your layout and we will calculate exactly how many pairs are required and where they should sit.

Does it work at night? Yes. Infrared operation is entirely unaffected by darkness, and night is when these systems earn their keep.

Will heavy rain trigger it? The dual beam design is specifically intended to avoid triggering on rain and small moving objects, though very heavy rain and thick fog will reduce effective range.

Can it be used indoors? Yes, across long internal spans such as warehouse aisles or corridors, where the same principles of alignment and stable mounting apply.

Buying from ZZ Marts. In stock at our Karachi (Saddar) and Lahore stores with nationwide delivery, supplied by Zam Zam Traders, trading in security equipment since 2005. Tell us your boundary shape and length and we will advise how many pairs you need, where to mount them, and what backup power to plan for. We would rather design a perimeter that actually works than sell you a single pair for a plot that needs four.