Understanding Howler Systems in Fire Safety

Construction and short-term sites face distinct fire risks due to ever-changing layouts, mobile equipment, plus dispersed work zones. A reliable alarm network is essential for quickly notifying all personnel in case of danger. The Howler range – including the GOLink system, HO alarms, and site alert units – offers a scalable, adaptable solution suitable for diverse environments.

Overview of HO Alarms?

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

• Loud warning: Typically 102 dB at 1 metre.


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


• Weather resistance: Many are IP-rated for external or semi-exposed conditions.

HO alarms extend main systems, securing areas not reached by the primary site alert infrastructure.

The Howler Site Alert Systems

The Howler Site Alert system is suited to compact and medium-sized sites. Each unit can work independently or be wired together with up to 20 others. When triggered, 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 feasible

Wireless Variant

Where wiring is impractical, 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 sprawling or temporary layouts.

Hybrid installations using both wired more info and wireless units are common and deliver better coverage.

GOLink Integration

GOLink acts as a wireless hub, supporting site-wide 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 website network.

First Aid Alert Feature

Some models, such as the H05 GOLink, include separate fire and first aid switches. The latter sends a howler golink systems discreet 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 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: Make sure 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.

How far does it reach?

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.

Purpose of switch covers?

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.

Final Thoughts

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, visit the Howler section at FireSense.