Understanding Howler Systems in Fire Safety

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

What are HO Alarms?

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

• High output: Typically 102 dB at 1 metre.


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


• Weather resistance: 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 Site-Wide 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, 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 Alert RF here 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 and wireless units are common and offer better coverage.

GOLink Integration

GOLink acts as a wireless hub, supporting site-wide communication and coordination.

System Integration

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, 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: 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 temporary areas.


• Regular testing: Weekly or monthly checks to confirm functionality and battery levels.


• Staff training: Ensure 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.

Wireless range of Site Alert RF?

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.

Purpose of switch covers?

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 requires adaptable, clearly communicated alarm strategies. The Howler range, including HO website alarms, Site Alerts and GOLink systems, provides robust protection for sites of all types. For product specifications, planners, or live demonstrations, see the Howler section at FireSense.