Understanding Howler Systems in Fire Safety

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

What are HO Alarms?

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

• High output: Generally 102 dB at 1 metre.


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


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

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

The Site-Wide Site Alert Systems

The Howler Site Alert system suits compact and medium-sized sites. Each unit can work alone or be wired together with up to 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 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 sprawling or temporary layouts.

Hybrid arrangements using both wired and get more info wireless units are common and deliver 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 communicate over the GOLink network.

First Aid Alert Feature

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

Effective Site Planning Tips

• 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?

get more info

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?

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.

Can wired and RF units be used together?

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

Effective fire safety requires adaptable, clearly communicated alarm strategies. The Howler range, 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.