Understanding Howler Systems in Fire Safety

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

Overview of HO Alarms?

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

• 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 external or semi-exposed installation.

HO alarms augment main systems, securing 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 independently or be wired together with a maximum of 20 others. When activated, all connected units 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 feasible

Site Alert RF

Where wiring is unworkable, the Site more info 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 radio-linked backbone, 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 communicate over the GOLink network.

First Aid Alert Feature

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

Best Practices for Deployment

• 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

How many alarms can I link together?

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.

Can GOLink connect to other systems?

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

Purpose of switch covers?

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

Can wired and RF units be used together?

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.

Final Thoughts

Reliable fire safety 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 read more section at FireSense.