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Burglar Alarm Bell Boxes & Sounders

External sirens for the ESP Fort Smart alarm range, fitted to a wall to warn of a triggered system and deter intruders. Both models use a weatherproof IP44 housing for outdoor mounting. The solar-powered version runs wirelessly with no mains run, while the wired model takes a mains feed. Pick the one that suits your fixing point and cabling on the building.

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What an external siren does

An external siren is the visible, audible part of an intruder alarm. Fitted to a wall on the outside of a building, it sounds when the system is triggered to draw attention to a break-in, and its presence on the wall helps deter intruders before anything happens. It is the part of the system neighbours and passers-by notice, so siting it where it can be seen and heard matters.

The options here

Both sirens in this range use a weatherproof housing made for outdoor mounting, so they stand up to the conditions a wall-mounted device meets through the seasons. One is solar powered and runs wirelessly, with no mains run to bring out to it, which keeps the fitting work down. The other is a wired model that takes a mains feed and connects into the building's wiring. The choice comes down to how you can route power to the fixing point you have in mind.

Who each suits

The solar-powered, wireless siren suits positions where running a cable out to the wall would be difficult, since it needs no mains feed and can sit where cable would be hard to reach. The wired model suits a fixing point you can reach with a mains connection, where a steady supply is straightforward to bring out. Both are intended for outdoor use as part of a wider alarm system, working alongside the hub and sensors that detect a break-in.

How to choose

Look first at where the siren will go and how power can reach it. If a cable run to that point is awkward, the solar-powered wireless model avoids it; if you have a mains feed available, the wired model uses it. Then check the fixing point gives the siren a clear, visible position on the building. Free UK delivery over GBP 99, worldwide shipping.

Frequently Asked Questions

What does an external siren do?
It is the outdoor, audible part of an intruder alarm. It sounds when the system is triggered to draw attention to a break-in, and its visible presence on the wall also helps deter intruders.

What is the difference between the solar and wired models?
The solar-powered model runs wirelessly with no mains run out to it, which suits positions where a cable would be hard to route. The wired model takes a mains feed, so it suits a fixing point you can reach with a mains connection.

Can these be mounted outside?
Yes. Both models use a weatherproof housing made for outdoor mounting, so they are intended to be fitted to an external wall as part of an alarm system.

Which one should I choose?
Base the choice on how power can reach the fixing point. Choose the solar-powered wireless siren where a cable run would be awkward, and the wired siren where a mains feed is available.

Where should the siren be fitted?
Fit it where it can be clearly seen and heard, since a visible siren helps deter intruders and an audible one draws attention when the system is triggered. Make sure the fixing point suits the model you have chosen and its power source.

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