Understanding Howler Systems in Fire Safety

Construction and temporary sites face distinct fire risks due to ever-changing 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, 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 remote site areas. No hard-wired connection is required, making installation simple.

• 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 outdoor or semi-exposed conditions.

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

The Site-Wide Site Alert Systems

The Howler Site Alert system suits smaller and medium-sized sites. Each unit can work alone or be wired together with a maximum of 20 others. When triggered, all connected units will sound and flash, check here 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

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 check here layouts.

Hybrid arrangements using both wired and wireless units are common and deliver better coverage.

Using the GOLink System Effectively

GOLink acts as a radio-linked backbone, 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.

Dual Use Functionality

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

Best Practices for Deployment

• Zone planning: Divide 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.

Wireless range of Site Alert RF?

Approx. 1 km in open air (may reduce with obstacles).

Is a panel required?

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.

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 robust protection for sites of all types. For product specifications, planners, or live demonstrations, see the Howler section at FireSense.