Understanding Howler Systems in Fire Safety

Construction and short-term sites face unique fire risks due to variable layouts, mobile equipment, and dispersed work zones. A dependable alarm setup is essential for promptly alerting everyone in case of danger. The Howler range – including GOLink, HO alarms, and site alert units – offers a flexible, customisable approach suitable for diverse environments.

What are HO Alarms?

HO alarms are self-contained, standalone units intended for mobile spaces such as portable offices or remote site areas. No hard-wired connection is required, making installation simple.

• High output: Typically 102 dB at 1 metre.


• Strobe integration: Available units feature a strobe light alongside the audible siren.


• Durable casing: Many are IP-rated for outdoor or semi-exposed installation.

HO alarms augment main systems, covering areas not reached by the primary site alert infrastructure.

The Howler Site Alert Systems

The Howler Site Alert system suits smaller and medium-sized sites. Each unit can work alone or be wired together with a maximum of 20 others. When activated, every linked alarm will sound and flash, ensuring broad 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 deliver better coverage.

GOLink Integration

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

GOLink Interface Unit

This module connects Howler alarms to third-party infrastructure (e.g. CCTV, access control), allowing signals to cascade when an event occurs. Up to 127 stations can communicate over the GOLink network.

First Aid Alert Feature

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

Best Practices for Deployment

• Zone planning: Map the site into clear zones (e.g. cabins, workshops) and position units for optimal reach.


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

How many alarms can I link together?

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

How far does it reach?

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

Do HO alarms need a control panel?

No. HO alarms operate independently without central panels.

Integration options?

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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.

First aid switch impact?

No. The signal is isolated unless configured otherwise.

Summary & Next Steps

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