The Importance of Howler Systems in Fire Safety

Construction and temporary sites face distinct fire risks due to variable layouts, mobile equipment, and dispersed work zones. A reliable alarm setup is vital for quickly notifying everyone in case of danger. The Howler range – including the GOLink system, HO alarms, and site alert units – offers a scalable, adaptable approach suitable for diverse environments.

Overview of HO Alarms?

HO alarms are battery-operated, standalone units intended for temporary spaces such as portable offices or remote site areas. No hard-wired connection is required, making installation straightforward.

• High output: Generally 102 dB at 1 metre.


• Visual indicators: Available units feature a strobe light alongside the audible siren.


• Weather resistance: Many are IP-rated for outdoor or semi-exposed installation.

HO alarms extend main systems, covering areas not reached by the central site alert infrastructure.

The Howler Site Alert Systems

The Howler Site Alert system is suited to smaller and medium-sized sites. Each unit can work alone or be wired together with a maximum of 20 others. When triggered, every linked alarm will sound and flash, ensuring comprehensive coverage.

• Audible warning: Approx. 100 dB at 1 m


• Visual cue: Built-in red LED beacon


• Best used where cable runs are straightforward

Wireless Variant

Where wiring is unworkable, the Site Alert RF allows up to 30 devices to connect wirelessly to a master unit. With up to 1 km open-air range and multiple frequency channels, this setup is ideal for larger or temporary layouts.

Hybrid installations using both wired and wireless units are common and offer better coverage.

Using the GOLink System Effectively

GOLink acts as a wireless hub, supporting complete communication and coordination.

GOLink Interface Unit

This module connects Howler alarms to external systems (e.g. CCTV, access control), allowing signals to cascade when an event occurs. Up to 127 stations can click here communicate over the GOLink network.

Dual Use Functionality

Some models, such as the H05 GOLink, incorporate separate fire and first aid switches. The latter sends a non-intrusive assistance signal to a control point without triggering full evacuation unless specified.

Effective Site Planning Tips

• Zone planning: Divide the site into clear zones (e.g. cabins, workshops) and locate alarms for optimal reach.


• Wired & wireless balance: Use wired alarms where infrastructure allows; RF units in more temporary areas.


• Regular testing: Weekly or monthly inspections to confirm functionality and battery levels.


• Staff training: Ensure all personnel understand alarm tones, first aid indicators, and emergency response steps.

Frequently Asked Questions

Max alarm connections?

Up to 20 wired Site Alert units using 2-core cable.

Wireless range of Site Alert RF?

Approx. 1 km in open air (may reduce with obstacles).

Is a panel required?

No. HO alarms operate independently without central panels.

Integration options?

Yes, via the Interface Unit. External systems such as CCTV and turnstiles can be integrated.

What is an alarmed switch cover?

It reduces false alarms by requiring cover removal before pressing. An alert sounds if tampered with.

Hybrid system support?

Yes. Mixed networks are common and synchronised through the GOLink system.

Does first aid alert trigger full system?

No. The signal is isolated unless configured otherwise.

Summary & Next Steps

Effective fire safety relies on adaptable, clearly communicated alarm strategies. The Howler suite, including HO alarms, Site Alerts and GOLink systems, provides robust protection for sites of all types. For product specifications, planners, or live demonstrations, see the Howler section at FireSense.