Fire Safety on Building Sites

Building environments, especially those in a transitional phase, introduce specific fire hazards due to shifting layouts, mobile equipment, and divided workforces. A sound alerting system is necessary for ensuring all personnel are aware without delay. The Howler line-up, including the radio-based GOLink system, HO units, and site alert models, provides a scalable safety setup to match various site demands.

A Look at HO Alarms

HO alarms are independent, battery-operated units used where hard-wired installations are not viable. Ideal for portable cabins or outbuildings, they require no wiring.

• High sound output: Around 102 dB at a metre’s distance.


• Visual signal option: Some models include integrated lights for visibility.


• Weatherproof: Many are suited for outdoor use or partially exposed areas.

These alarms provide additional coverage where the core alert network may not reach.

The Site-Wide Alert Range

Suitable for mid-sized projects, the Site Alert system operates individually or in groups of up to 20 units using a simple two-core cable. When triggered, all devices in the series respond simultaneously.

• Approx. 100 dB sound level at 1 metre


• Built-in flashing beacon for loud or noisy settings


• Ideal where cabling is straightforward

Site Alert RF (Radio-Frequency)

Where cable routes aren't possible, Site Alert RF links up to 30 units over wireless. It has an open-area range of around 1 km and supports multiple channels for interference avoidance.

Combining wireless and cabled systems is commonly the best choice for sites with varying structures.

Integrating the GOLink System

The GOLink system acts as a communication core for large, multi-zone installations, using wireless signals to link alarms.

GOLink Interface Connections

click here Through the Interface Unit, it’s possible to link turnstiles, autodiallers, CCTV, and other site safety components. Up to 127 points can connect across a site-wide network.

First Aid Callouts

Certain models (e.g. H05 GOLink) include a first aid button alongside the fire alert. The first aid signal quietly sends a location-specific assistance request, allowing medical needs to be flagged without general evacuation.

How to Deploy Effectively

• Zone assessment: Identify where alarms need to be heard or seen, dividing the site into manageable sectors.


• Choose connection types wisely: Use hard-wired alarms where feasible, supplementing with RF in distant or pop-up areas.


• Set a maintenance routine: Schedule regular testing and check battery levels.


• Training & signage: Ensure directions are posted and team members know how to respond to alerts.

Common Questions

Wired capacity?

Up to 20 Site Alert units can be connected using 2-core cable.

How far does the wireless version reach?

Approx. 1 km in open-air conditions, though physical obstructions can reduce range.

Do HO alarms need a base station?

No, HO models are self-sufficient and do not require central control.

Can GOLink interface with other site systems?

Yes, external systems can be connected via the GOLink Interface Unit.

Purpose of switch protection?

It reduces false alarms by sounding a warning if tampered with before activation.

Can both cabled and RF alarms work together?

Yes, the GOLink system allows wired and wireless units to operate on the same network.

Does first aid signal cause evacuation?

No. It sends a targeted alert to designated receivers without activating evacuation systems—unless configured otherwise.

Final Notes

Whether your project involves one zone or howler site alarms several, Howler alarms—HO, GOLink, and Site Alert—offer solutions that adjust to varying conditions. For details, planning tools or live demos, visit the Howler section on FireSense.