Understanding Howler Systems in Fire Safety

Construction and temporary sites face unique fire risks due to variable layouts, mobile equipment, plus dispersed work zones. A dependable alarm network is essential for promptly alerting everyone in case of danger. The Howler range – including the GOLink system, HO alarms, and site alert units – offers a flexible, adaptable approach suitable for varied environments.

What are HO Alarms?

HO alarms are battery-operated, standalone units intended for temporary spaces such as site cabins 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 independently or be wired together with a maximum of 20 others. When triggered, all connected units 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

Site Alert RF

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 website setup is ideal for larger or temporary layouts.

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

GOLink Integration

GOLink acts as a radio-linked backbone, supporting site-wide communication and coordination.

System Integration

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

Dual Use Functionality

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.

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?

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.

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.

Final Thoughts

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