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 setup is vital for promptly alerting all personnel in case of danger. The Howler range – including the GOLink system, HO alarms, and site alert units – offers a flexible, customisable solution suitable for diverse environments.

What are HO Alarms?

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

• Loud warning: Generally 102 dB at 1 metre.


• Strobe integration: 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, covering areas not reached by the primary site alert infrastructure.

The Howler Site Alert Systems

The Howler Site Alert system suits smaller 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

Wireless Variant

Where wiring is impractical, 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 larger or temporary layouts.

Hybrid arrangements using both wired and check here wireless units are common and offer better coverage.

Using the GOLink System Effectively

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

GOLink Interface Unit

This module connects Howler alarms to external systems (e.g. CCTV, howler site alert systems 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, incorporate 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 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.

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.

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?

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