Understanding Howler Systems in Fire Safety

Construction and short-term sites face unique 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 flexible, customisable approach suitable for diverse environments.

What are HO Alarms?

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

• Loud warning: Typically 102 dB at 1 metre.


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


• Durable casing: Many are IP-rated for outdoor or semi-exposed conditions.

HO alarms augment main systems, covering areas not reached by the primary site alert infrastructure.

The Site-Wide Site Alert Systems

The Howler Site Alert system is suited to smaller and medium-sized sites. Each unit can work alone 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

Wireless Variant

Where wiring is impractical, the Site Alert RF allows up to 30 devices to connect wirelessly howler golink systems 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 arrangements 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.

GOLink Interface Unit

more info This module connects Howler alarms to external systems (e.g. CCTV, access control), allowing here 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, incorporate 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 locate alarms 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: 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).

Do HO alarms need a control panel?

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.

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.

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 suite, including HO alarms, Site Alerts and GOLink systems, provides dependable protection for sites of all types. For product specifications, planners, or live demonstrations, see the Howler section at FireSense.